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181-545: Stephen Jay Gould ( / ɡ uː l d / GOOLD ; September 10, 1941 – May 20, 2002) was an American paleontologist , evolutionary biologist , and historian of science . He was one of the most influential and widely read authors of popular science of his generation. Gould spent most of his career teaching at Harvard University and working at the American Museum of Natural History in New York. In 1996, Gould
362-484: A Marxist father" he stated that his father's politics were "very different" from his own. In describing his own political views, he has said they "tend to the left of center." According to Gould the most influential political books he read were C. Wright Mills ' The Power Elite and the political writings of Noam Chomsky . While attending Antioch College in Yellow Springs, Ohio , in the early 1960s, Gould
543-405: A dialectical and materialist interpretation of historical development, better known as historical materialism , to analyse class relations, social conflict , and social transformation . Marxism originates with the works of 19th-century German philosophers Karl Marx and Friedrich Engels . Marxism has developed over time into various branches and schools of thought , and as a result, there
724-471: A jigsaw puzzle . Rocks normally form relatively horizontal layers, with each layer younger than the one underneath it. If a fossil is found between two layers whose ages are known, the fossil's age must lie between the two known ages. Because rock sequences are not continuous, but may be broken up by faults or periods of erosion , it is very difficult to match up rock beds that are not directly next to one another. However, fossils of species that survived for
905-522: A socialist revolution in contemporary society is inevitable. While the inevitability of an eventual socialist revolution is a controversial debate among many different Marxist schools of thought , all Marxists believe socialism is a necessity. Marxists argue that a socialist society is far better for most of the populace than its capitalist counterpart. Prior to the Russian Revolution , Vladimir Lenin wrote: "The socialisation of production
1086-519: A Marxist would conclude that capitalism exploits and oppresses the proletariat; therefore, capitalism will inevitably lead to a proletarian revolution . In a socialist society, private property —as the means of production—would be replaced by cooperative ownership. A socialist economy would not base production on the creation of private profits but on the criteria of satisfying human needs—that is, production for use . Friedrich Engels explained that "the capitalist mode of appropriation, in which
1267-479: A backlash against Marxist thought in post-communist states, such as Poland . However, it remains prominent in the sociological research sanctioned and supported by communist states, such as in China . Marxian economics is a school of economic thought tracing its foundations to the critique of classical political economy first expounded upon by Karl Marx and Friedrich Engels. Marxian economics concerns itself with
1448-468: A cartoon version of himself on the television series The Simpsons . In the episode " Lisa the Skeptic ", Lisa finds a skeleton that many people believe is an apocalyptic angel. Lisa contacts Gould and asks him to test the skeleton's DNA . The fossil is discovered to be a marketing gimmick for a new mall. During production, the only phrase Gould objected to was a line in the script that introduced him as
1629-526: A certain stage of development, the material productive forces of society come into conflict with the existing relations of production or—this merely expresses the same thing in legal terms—with the property relations within the framework of which they have operated hitherto. From forms of development of the productive forces these relations turn into their fetters. Then begins an era of social revolution ." These inefficiencies manifest themselves as social contradictions in society which are, in turn, fought out at
1810-552: A collision that formed the Moon about 40 million years later, may have cooled quickly enough to have oceans and an atmosphere about 4,440 million years ago . There is evidence on the Moon of a Late Heavy Bombardment by asteroids from 4,000 to 3,800 million years ago . If, as seems likely, such a bombardment struck Earth at the same time, the first atmosphere and oceans may have been stripped away. Paleontology traces
1991-526: A column for Discover magazine in 1985 titled "The Median Isn't the Message", which discusses his reaction to reading that "mesothelioma is incurable, with a median mortality of only eight months after discovery." In his essay, he describes the actual significance behind this fact, and his relief upon recognizing that statistical averages are useful abstractions, and by themselves do not encompass "our actual world of variation, shadings, and continua." Gould
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#17327795288882172-602: A common ancestor. Ideally the "family tree" has only two branches leading from each node ("junction"), but sometimes there is too little information to achieve this, and paleontologists have to make do with junctions that have several branches. The cladistic technique is sometimes fallible, as some features, such as wings or camera eyes , evolved more than once, convergently – this must be taken into account in analyses. Evolutionary developmental biology , commonly abbreviated to "Evo Devo", also helps paleontologists to produce "family trees", and understand fossils. For example,
2353-551: A concrete study of the actual conditions in Europe. According to the Marxist theoretician and revolutionary socialist Vladimir Lenin, "the principal content of Marxism" was "Marx's economic doctrine." Marx demonstrated how the capitalist bourgeoisie and their economists were promoting what he saw as the lie that "the interests of the capitalist and of the worker are ... one and the same." He believed that they did this by purporting
2534-456: A constant rate. These " molecular clocks ", however, are fallible, and provide only a very approximate timing: for example, they are not sufficiently precise and reliable for estimating when the groups that feature in the Cambrian explosion first evolved, and estimates produced by different techniques may vary by a factor of two. Earth formed about 4,570 million years ago and, after
2715-416: A continuous publication of 300 essays. Many of his essays were reprinted in collected volumes that became bestselling books such as Ever Since Darwin and The Panda's Thumb , Hen's Teeth and Horse's Toes , and The Flamingo's Smile . A passionate advocate of evolutionary theory, Gould wrote prolifically on the subject, trying to communicate his understanding of contemporary evolutionary biology to
2896-467: A controversial topic in evolutionary biology . An illustrative example of Gould's approach can be found in Elisabeth Lloyd 's case study suggesting that the female orgasm is a by-product of shared developmental pathways. Gould also wrote on this topic in his essay "Male Nipples and Clitoral Ripples," prompted by Lloyd's earlier work. Gould was criticized by philosopher Daniel Dennett for using
3077-432: A couple of years I will be able to gather in one volume my view of how evolution works. It is to me a great consolation because it represents the putting together of a lifetime of thinking into one source. That book will never be particularly widely read. It's going to be far too long, and it's only for a few thousand professionals—very different from my popular science writings—but it is of greater consolation to me because it
3258-403: A data source that is not limited to animals with easily fossilised hard parts, and they reflect organisms' behaviours. Also many traces date from significantly earlier than the body fossils of animals that are thought to have been capable of making them. Whilst exact assignment of trace fossils to their makers is generally impossible, traces may for example provide the earliest physical evidence of
3439-567: A double major in geology and philosophy in 1963. During this time, he also studied at the University of Leeds in the United Kingdom. After completing graduate work at Columbia University in 1967 under the guidance of Norman Newell , he was immediately hired by Harvard University , where he worked until the end of his life (1967–2002). In 1973, Harvard promoted him to professor of geology and curator of invertebrate paleontology at
3620-573: A fortunate accident during other research. For example, the 1980 discovery by Luis and Walter Alvarez of iridium , a mainly extraterrestrial metal, in the Cretaceous – Paleogene boundary layer made asteroid impact the most favored explanation for the Cretaceous–Paleogene extinction event – although debate continues about the contribution of volcanism. A complementary approach to developing scientific knowledge, experimental science ,
3801-413: A labourer—is synonymous with surplus labour, and capitalist exploitation is thus realised as deriving surplus value from the worker. In pre-capitalist economies , exploitation of the worker was achieved via physical coercion . Under the capitalist mode of production, workers do not own the means of production and must "voluntarily" enter into an exploitative work relationship with a capitalist to earn
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#17327795288883982-469: A longer period of evolutionary stability. It was Gould who coined the term "punctuated equilibria" though the theory was originally presented by Eldredge in his doctoral dissertation on Devonian trilobites and his article published the previous year on allopatric speciation . According to Gould, punctuated equilibrium revised a key pillar "in the central logic of Darwinian theory ." Some evolutionary biologists have argued that while punctuated equilibrium
4163-501: A materialist theory of history, Marx did not claim to have produced a master key to history and that the materialist conception of history is not "an historico-philosophic theory of the marche générale , imposed by fate upon every people, whatever the historic circumstances in which it finds itself." In a letter to the editor of the Russian newspaper paper Otechestvennyje Zapiski (1877), he explained that his ideas were based upon
4344-535: A method of investigating evolutionary lineages and process, possibly because he was concerned that such investigations would lead to neglect of the details in historical biology, which he considered all-important. In the early 1990s this led him into a debate with Derek Briggs , who had begun to apply quantitative cladistic techniques to the Burgess Shale fossils, about the methods to be used in interpreting these fossils. Around this time cladistics rapidly became
4525-821: A minor group until the first jawed fish appeared in the Late Ordovician . The spread of animals and plants from water to land required organisms to solve several problems, including protection against drying out and supporting themselves against gravity . The earliest evidence of land plants and land invertebrates date back to about 476 million years ago and 490 million years ago respectively. Those invertebrates, as indicated by their trace and body fossils, were shown to be arthropods known as euthycarcinoids . The lineage that produced land vertebrates evolved later but very rapidly between 370 million years ago and 360 million years ago ; recent discoveries have overturned earlier ideas about
4706-504: A noted public face of science, often appearing on television. In 1984 Gould received his own NOVA special on PBS . Other appearances included interviews on CNN 's Crossfire and Talkback Live , NBC 's The Today Show , and regular appearances on PBS's Charlie Rose show. Gould was also a guest in all seven episodes of the Dutch talk series A Glorious Accident , in which he appeared with his close friend Oliver Sacks . Gould
4887-447: A number of biological considerations, Gould permits that evolution may operate in human cultural evolution through a Lamarckian mechanism. Gould goes on to argue that the disappearance of the 0.400 batting average in baseball is paradoxically due to the inclusion of better players in the league, rather than players becoming worse over time. In his view such a process is likely reflective in a number of cultural phenomena including sports,
5068-403: A post-capitalist society—positive humanism, socialism, Communism, realm of free individuality, free association of producers, etc. He used these terms completely interchangeably. The notion that 'socialism' and 'Communism' are distinct historical stages is alien to his work and only entered the lexicon of Marxism after his death." According to orthodox Marxist theory, overthrowing capitalism by
5249-555: A rapid increase in knowledge about the history of life on Earth and to progress in the definition of the geologic time scale , largely based on fossil evidence. Although she was rarely recognised by the scientific community, Mary Anning was a significant contributor to the field of palaeontology during this period; she uncovered multiple novel Mesozoic reptile fossils and deducted that what were then known as bezoar stones are in fact fossilised faeces . In 1822 Henri Marie Ducrotay de Blainville , editor of Journal de Physique , coined
5430-543: A relatively short time can be used to link up isolated rocks: this technique is called biostratigraphy . For instance, the conodont Eoplacognathus pseudoplanus has a short range in the Middle Ordovician period. If rocks of unknown age are found to have traces of E. pseudoplanus , they must have a mid-Ordovician age. Such index fossils must be distinctive, be globally distributed and have a short time range to be useful. However, misleading results are produced if
5611-452: A scientist, but for a long time I've regarded him as the second most influential historian of science (next to Thomas Kuhn )." Gould's undergraduate course, Science B-16: History of the Earth and Life, was taught in a Harvard Science Center lecture hall with a 250-seat capacity. Science B-16 was so oversubscribed that an annual lottery was held to see which students would be allowed to enroll in
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5792-518: A self-described Darwinist, Gould's emphasis was less gradualist and reductionist than most neo-Darwinists . He fiercely opposed many aspects of sociobiology and its intellectual descendant evolutionary psychology . He devoted considerable time to fighting against creationism , creation science , and intelligent design . Most notably, Gould provided expert testimony against the equal-time creationism law in McLean v. Arkansas . Gould later developed
5973-728: A sociobiological framework that suggested that many social behaviors have a strong evolutionary basis. In response, Gould, Richard Lewontin , and others from the Boston area wrote the subsequently well-referenced letter to The New York Review of Books entitled, "Against 'Sociobiology'". This open letter criticized Wilson's notion of a "deterministic view of human society and human action." But Gould did not rule out sociobiological explanations for many aspects of animal behavior, and later wrote: "Sociobiologists have broadened their range of selective stories by invoking concepts of inclusive fitness and kin selection to solve (successfully I think)
6154-608: A steady increase in brain size after about 3 million years ago . There is a long-running debate about whether modern humans are descendants of a single small population in Africa , which then migrated all over the world less than 200,000 years ago and replaced previous hominine species, or arose worldwide at the same time as a result of interbreeding . Life on earth has suffered occasional mass extinctions at least since 542 million years ago . Despite their disastrous effects, mass extinctions have sometimes accelerated
6335-471: A wide audience. A recurring theme in his writings is the history and development of pre-evolutionary and evolutionary thought . He was also an enthusiastic baseball fan and sabermetrician (analyst of baseball statistics), and made frequent reference to the sport in his essays. Many of his baseball essays were anthologized in his posthumously published book Triumph and Tragedy in Mudville (2003). Although
6516-476: A wider latitude of design choice than they intended for their analogy. But Dennett's critique of the architectural basis of the analogy goes even further astray because he slights the technical rationale of the architectural elements in question." Gould favored the argument that evolution has no inherent drive towards long-term " progress ". Uncritical commentaries often portray evolution as a ladder of progress , leading towards bigger, faster, and smarter organisms,
6697-692: A word, oppressor and oppressed, stood in constant opposition to one another, carried on uninterrupted, now hidden, now open fight, a fight that each time ended, either in a revolutionary reconstitution of society at large, or in the common ruin of the contending classes." Marx considered recurring class conflicts as the driving force of human history as such conflicts have manifested as distinct transitional stages of development in Western Europe . Accordingly, Marx designated human history as encompassing four stages of development in relations of production: While historical materialism has been referred to as
6878-482: Is a chance to put into one place a whole way of thinking about evolution that I've struggled with all my life." Gould became widely known through his popular essays on evolution in the Natural History magazine. His essays were published in a series entitled This View of Life (a phrase from the concluding paragraph of Charles Darwin 's Origin of Species ) from January 1974 to January 2001, amounting to
7059-408: Is a process accomplished by the so-called thinker consciously, it is true, but with a false consciousness. The real motive forces impelling him remain unknown to him; otherwise it simply would not be an ideological process. Hence he imagines false or seeming motive forces." Because the ruling class controls the society's means of production, the superstructure of society (i.e. the ruling social ideas)
7240-453: Is a study of educational reform in the U.S. and its relationship to the reproduction of capitalism and the possibilities of utilising its contradictions in the revolutionary movement. The work of Peter McLaren , especially since the turn of the 21st century, has further developed Marxist educational theory by developing revolutionary critical pedagogy, as has the work of Glenn Rikowski, Dave Hill, and Paula Allman. Other Marxists have analysed
7421-512: Is a subject for philosophers, theologians, students of the humanities, indeed for all thinking people. The answers will not be read passively from nature; they do not, and cannot, arise from the data of science. The factual state of the world does not teach us how we, with our powers for good and evil, should alter or preserve it in the most ethical manner. Gould also spoke out against creationist misuse of his work and theory, especially with respect to how his theory of punctuated equilibrium relates to
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7602-401: Is bound to lead to the conversion of the means of production into the property of society. ... This conversion will directly result in an immense increase in productivity of labour, a reduction of working hours, and the replacement of the remnants, the ruins of small-scale, primitive, disunited production by collective and improved labour." The failure of the 1905 Russian Revolution , along with
7783-403: Is certain and that is that I am not a Marxist." The discovery of the materialist conception of history, or rather, the consistent continuation and extension of materialism into the domain of social phenomenon, removed two chief defects of earlier historical theories. In the first place, they at best examined only the ideological motives of the historical activity of human beings, without grasping
7964-595: Is composed only of eukaryotic cells, and the earliest evidence for it is the Francevillian Group Fossils from 2,100 million years ago , although specialisation of cells for different functions first appears between 1,430 million years ago (a possible fungus) and 1,200 million years ago (a probable red alga ). Sexual reproduction may be a prerequisite for specialisation of cells, as an asexual multicellular organism might be at risk of being taken over by rogue cells that retain
8145-402: Is determined by the best interests of the ruling class. In The German Ideology , Marx says that "[t]he ideas of the ruling class are in every epoch the ruling ideas, i.e. the class which is the ruling material force of society, is, at the same time, its ruling intellectual force." The term political economy initially referred to the study of the material conditions of economic production in
8326-449: Is divided between the rich and the poor, and that some people subjugate and exploit other people, you're lost in a forest, not knowing anything. — Cuban revolutionary and Marxist–Leninist politician Fidel Castro on discovering Marxism, 2009 This new way of thinking was invented because socialists believed that common ownership of the means of production (i.e. the industries , land, wealth of nature, trade apparatus and wealth of
8507-431: Is for the best in this best of all possible worlds". Gould and Lewontin asserted that it is Panglossian for evolutionary biologists to view all traits as atomized things that had been naturally selected for, and criticised biologists for not granting theoretical space to other causes, such as phyletic and developmental constraints . The relative frequency of spandrels, so defined, versus adaptive features in nature, remains
8688-482: Is hard to decide at what level to place a new higher-level grouping, e.g. genus or family or order ; this is important since the Linnaean rules for naming groups are tied to their levels, and hence if a group is moved to a different level it must be renamed. Paleontologists generally use approaches based on cladistics , a technique for working out the evolutionary "family tree" of a set of organisms. It works by
8869-448: Is introduced. Because the surplus produced by the workers is the property of the society as a whole, there are no classes of producers and appropriators. Additionally, as the state originates in the bands of retainers hired by the first ruling classes to protect their economic privilege, it will wither away as its conditions of existence have disappeared. According to The Oxford Handbook of Karl Marx , "Marx used many terms to refer to
9050-476: Is necessary to understand his later works properly. Contrary to the official dialectical materialism of the Soviet Union and interpretations of Marx rooted in the structural Marxism of Louis Althusser , Marxist humanists argue that Marx's work was an extension or transcendence of enlightenment humanism . Whereas other Marxist philosophies see Marxism as natural science , Marxist humanism reaffirms
9231-515: Is no single, definitive " Marxist theory ". Marxism has had a profound effect in shaping the modern world, with various left-wing and far-left political movements taking inspiration from it in varying local contexts. In addition to the various schools of thought , which emphasise or modify elements of classical Marxism , several Marxian concepts have been incorporated into an array of social theories . This has led to widely varying conclusions. Alongside Marx's critique of political economy ,
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#17327795288889412-405: Is not directly selected for by natural selection. Proposed examples include the "masculinized genitalia in female hyenas , exaptive use of an umbilicus as a brooding chamber by snails, the shoulder hump of the giant Irish deer , and several key features of human mentality." In Voltaire 's Candide , Dr. Pangloss is portrayed as a clueless scholar who, despite the evidence, insists that "all
9593-416: Is not just incidentally progressive, it is deeply, dyed-in-the-wool, indispensably progressive." Gould's arguments against progress in evolutionary biology did not extend towards a notion of progress in general or notions of cultural evolution . In Full House , Gould compares two notions of progress against one another. While the first concept of progress, evolutionary progress, is argued to be invalid for
9774-465: Is not prerequisite. In addition to criticism, Marx has also praised some of the results of capitalism stating that it "has created more massive and more colossal productive forces than have all preceding generations together" and that it "has put an end to all feudal, patriarchal arrangements." Marx posited that the remaining feudalist societies in the world and forms of socialism that did not conform with his writings would be replaced by communism in
9955-561: Is often critical of reformist positions such as those held by social democrats . Libertarian Marxist currents often draw from Karl Marx and Friedrich Engels' later works, specifically the Grundrisse and The Civil War in France ; emphasising the Marxist belief in the ability of the working class to forge its destiny without the need for a vanguard party to mediate or aid its liberation. Along with anarchism , libertarian Marxism
10136-443: Is often misunderstood by non-scientists, and according to Richard Dawkins has been oversold by the media. Some critics jokingly referred to the theory of punctuated equilibrium as "evolution by jerks", which prompted Gould to describe phyletic gradualism as "evolution by creeps." Gould made significant contributions to evolutionary developmental biology , especially in his work Ontogeny and Phylogeny . In this book he emphasized
10317-443: Is often said to work by conducting experiments to disprove hypotheses about the workings and causes of natural phenomena. This approach cannot prove a hypothesis, since some later experiment may disprove it, but the accumulation of failures to disprove is often compelling evidence in favor. However, when confronted with totally unexpected phenomena, such as the first evidence for invisible radiation , experimental scientists often use
10498-766: Is one of the main currents of libertarian socialism . Libertarian Marxism includes currents such as autonomism , council communism , De Leonism , Lettrism , parts of the New Left , Situationism , Freudo-Marxism (a form of psychoanalysis ), Socialisme ou Barbarie and workerism . Libertarian Marxism has often strongly influenced both post-left and social anarchists . Notable theorists of libertarian Marxism have included Maurice Brinton , Cornelius Castoriadis , Guy Debord , Raya Dunayevskaya , Daniel Guérin , C. L. R. James , Rosa Luxemburg , Antonio Negri , Anton Pannekoek , Fredy Perlman , Ernesto Screpanti , E. P. Thompson , Raoul Vaneigem , and Yanis Varoufakis ,
10679-594: Is one that contained an extinct "crocodile-like" marine reptile, which eventually came to be known as the mosasaurid Mosasaurus of the Cretaceous period. The first half of the 19th century saw geological and paleontological activity become increasingly well organised with the growth of geologic societies and museums and an increasing number of professional geologists and fossil specialists. Interest increased for reasons that were not purely scientific, as geology and paleontology helped industrialists to find and exploit natural resources such as coal. This contributed to
10860-401: Is our only means of giving rocks greater than about 50 million years old an absolute age, and can be accurate to within 0.5% or better. Although radiometric dating requires very careful laboratory work, its basic principle is simple: the rates at which various radioactive elements decay are known, and so the ratio of the radioactive element to the element into which it decays shows how long ago
11041-424: Is the evolution of form, and the problem of how it is that you can get this diversity amid so little genetic difference, so far as we can tell, is a very interesting one. And if we could solve this we'd learn something general about the evolution of form." Given Cerion 's extensive geographic diversity, Gould later lamented that if Christopher Columbus had only catalogued a single Cerion it would have ended
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#173277952888811222-456: Is the scientific study of life that existed prior to the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossils to classify organisms and study their interactions with each other and their environments (their paleoecology ). Paleontological observations have been documented as far back as the 5th century BC. The science became established in
11403-503: Is thought to have been propelled by coevolution with pollinating insects. Social insects appeared around the same time and, although they account for only small parts of the insect "family tree", now form over 50% of the total mass of all insects. Humans evolved from a lineage of upright-walking apes whose earliest fossils date from over 6 million years ago . Although early members of this lineage had chimp -sized brains, about 25% as big as modern humans', there are signs of
11584-632: The Bermudian genus Poecilozonites , while his later work concentrated on the West Indian genus Cerion . According to Gould " Cerion is the land snail of maximal diversity in form throughout the entire world. There are 600 described species of this single genus. In fact, they're not really species, they all interbreed, but the names exist to express a real phenomenon which is this incredible morphological diversity. Some are shaped like golf balls, some are shaped like pencils. ... Now my main subject
11765-629: The Boston Cecilia , and he was a great aficionado of Gilbert and Sullivan operas. He collected rare antiquarian books , possessed an enthusiasm for architecture , and delighted in city walks. He often traveled to Europe, and spoke French , German , Russian , and Italian . He sometimes alluded ruefully to his tendency to put on weight. Gould married artist Deborah Lee on October 3, 1965. Gould met Lee while they were students together at Antioch College . They had two sons, Jesse and Ethan, and were married for 30 years. His second marriage in 1995
11946-742: The Discovery Institute inspired the National Center for Science Education to create a pro-evolution counterpart called " Project Steve ," which is named in Gould's honor. In 2011 the executive council of the Committee for Skeptical Inquiry (CSI) selected Gould for inclusion in CSI's "Pantheon of Skeptics" created to remember the legacy of deceased CSI fellows and their contributions to the cause of scientific skepticism. Gould also became
12127-529: The Middle Ages the Persian naturalist Ibn Sina , known as Avicenna in Europe, discussed fossils and proposed a theory of petrifying fluids on which Albert of Saxony elaborated in the 14th century. The Chinese naturalist Shen Kuo (1031–1095) proposed a theory of climate change based on the presence of petrified bamboo in regions that in his time were too dry for bamboo. In early modern Europe ,
12308-538: The Neogene - Quaternary . In deeper-level deposits in western Europe are early-aged mammals such as the palaeothere perissodactyl Palaeotherium and the anoplotheriid artiodactyl Anoplotherium , both of which were described earliest after the former two genera, which today are known to date to the Paleogene period. Cuvier figured out that even older than the two levels of deposits with extinct large mammals
12489-637: The Permian–Triassic extinction event . Amphibians Extinct Synapsids Mammals Extinct reptiles Lizards and snakes Extinct Archosaurs Crocodilians Extinct Dinosaurs Birds Naming groups of organisms in a way that is clear and widely agreed is important, as some disputes in paleontology have been based just on misunderstandings over names. Linnaean taxonomy is commonly used for classifying living organisms, but runs into difficulties when dealing with newly discovered organisms that are significantly different from known ones. For example: it
12670-516: The Permian–Triassic extinction event . A relatively recent discipline, molecular phylogenetics , compares the DNA and RNA of modern organisms to re-construct the "family trees" of their evolutionary ancestors. It has also been used to estimate the dates of important evolutionary developments, although this approach is controversial because of doubts about the reliability of the " molecular clock ". Techniques from engineering have been used to analyse how
12851-539: The United States Navy . His mother Eleanor was an artist, whose parents were Jewish immigrants living and working in the city's Garment District . Gould and his younger brother Peter were raised in Bayside , a middle-class neighborhood in the northeastern section of Queens. He attended P.S. 26 elementary school and graduated from Jamaica High School . When Gould was five years old his father took him to
13032-454: The embryological development of some modern brachiopods suggests that brachiopods may be descendants of the halkieriids , which became extinct in the Cambrian period. Paleontology seeks to map out how living things have changed through time. A substantial hurdle to this aim is the difficulty of working out how old fossils are. Beds that preserve fossils typically lack the radioactive elements needed for radiometric dating . This technique
13213-713: The evolution of feathers . Gould was a champion of biological constraints , internal limitations upon developmental pathways, as well as other non-selectionist forces in evolution. Rather than direct adaptations , he considered many higher functions of the human brain to be the unintended side consequence of natural selection . To describe such co-opted features, he coined the term exaptation with paleontologist Elisabeth Vrba . Gould believed this feature of human mentality undermines an essential premise of human sociobiology and evolutionary psychology . In 1975, Gould's Harvard colleague E. O. Wilson introduced his analysis of animal behavior (including human behavior) based on
13394-453: The lung , an aggressive form of cancer which had already spread to his brain, liver, and spleen. This cancer was unrelated to his previous bout of abdominal cancer in 1982, though it is also associated with asbestos exposure. He died in his home "in a bed set up in the library of his SoHo loft, surrounded by his wife Rhonda, his mother Eleanor, and the many books he loved." Gould began his higher education at Antioch College , graduating with
13575-497: The pseudoscience used in the service of racism and sexism . Interspersed throughout his scientific essays for Natural History magazine, Gould frequently referred to his non-scientific interests and pastimes. As a boy he collected baseball cards and remained an avid New York Yankees fan throughout his life. As an adult he was fond of science fiction movies, but often lamented their poor storytelling and presentation of science. His other interests included singing baritone in
13756-526: The " jigsaw puzzles " of biostratigraphy (arrangement of rock layers from youngest to oldest). Classifying ancient organisms is also difficult, as many do not fit well into the Linnaean taxonomy classifying living organisms, and paleontologists more often use cladistics to draw up evolutionary "family trees". The final quarter of the 20th century saw the development of molecular phylogenetics , which investigates how closely organisms are related by measuring
13937-464: The "sum total of the forces of production accessible to men determines the condition of society" and forms a society's economic base. The base includes the material forces of production such as the labour , means of production and relations of production , i.e. the social and political arrangements that regulate production and distribution. From this base rises a superstructure of legal and political "forms of social consciousness " that derive from
14118-426: The "world's most brilliant paleontologist". In 2002, the show paid tribute to Gould after his death, dedicating the season 13 finale to his memory. Gould had died two days before the episode aired. Paleontology Paleontology ( / ˌ p eɪ l i ɒ n ˈ t ɒ l ə dʒ i , ˌ p æ l i -, - ən -/ PAY -lee-on- TOL -ə-jee, PAL -ee-, -ən- ), also spelled palaeontology or palæontology ,
14299-463: The 18th century as a result of Georges Cuvier 's work on comparative anatomy , and developed rapidly in the 19th century. The term has been used since 1822 formed from Greek παλαιός ( 'palaios' , "old, ancient"), ὄν ( 'on' , ( gen. 'ontos' ), "being, creature"), and λόγος ( 'logos' , "speech, thought, study"). Paleontology lies on the border between biology and geology , but it differs from archaeology in that it excludes
14480-666: The 1940s, the Western Marxist school became accepted within Western academia, subsequently fracturing into several different perspectives, such as the Frankfurt School or critical theory . The legacy of Critical Theory as a major offshoot of Marxism is controversial. The common thread linking Marxism and Critical theory is an interest in struggles to dismantle structures of oppression, exclusion, and domination. Due to its former state-supported position, there has been
14661-555: The Early Cambrian , along with several "weird wonders" that bear little obvious resemblance to any modern animals. There is a long-running debate about whether this Cambrian explosion was truly a very rapid period of evolutionary experimentation; alternative views are that modern-looking animals began evolving earlier but fossils of their precursors have not yet been found, or that the "weird wonders" are evolutionary "aunts" and "cousins" of modern groups. Vertebrates remained
14842-411: The Earth's organic and inorganic past". William Whewell (1794–1866) classified paleontology as one of the historical sciences, along with archaeology , geology, astronomy , cosmology , philology and history itself: paleontology aims to describe phenomena of the past and to reconstruct their causes. Hence it has three main elements: description of past phenomena; developing a general theory about
15023-456: The Hall of Dinosaurs in the American Museum of Natural History , where he first encountered Tyrannosaurus rex . "I had no idea there were such things—I was awestruck," Gould once recalled. It was in that moment that he decided to become a paleontologist. Raised in a secular Jewish home, Gould did not formally practice religion and preferred to be called an agnostic . When asked directly if he
15204-705: The Humanist of the Year for his lifetime of work. In 2008, he was posthumously awarded the Darwin–Wallace Medal , along with 12 other recipients. (Until 2008, this medal had been awarded every 50 years by the Linnean Society of London .) Early in his career, Gould and his colleague Niles Eldredge developed the theory of punctuated equilibrium , which describes the rate of speciation in the fossil record as occurring relatively rapidly, which then alternates to
15385-560: The Industrial Revolution which undermines the democratic agency of citizens. Marxists differ in their positions towards democracy. Types of democracy in Marxism include Soviet democracy , New Democracy , Whole-process people's democracy and can include voting on how surplus labour is to be organised. According to democratic centralism political decisions reached by voting in the party are binding for all members of
15566-480: The Panglossian Paradigm ", which introduced the architectural term " spandrel " into evolutionary biology. In architecture, a spandrel is a triangular space which exists over the haunches of an arch. Spandrels—more often called pendentives in this context—are found particularly in classical architecture, especially Byzantine and Renaissance churches. When visiting Venice in 1978, Gould noted that
15747-412: The ability to reproduce. The earliest known animals are cnidarians from about 580 million years ago , but these are so modern-looking that they must be descendants of earlier animals. Early fossils of animals are rare because they had not developed mineralised , easily fossilized hard parts until about 548 million years ago . The earliest modern-looking bilaterian animals appear in
15928-567: The administration of General Secretary Joseph Stalin , a great emphasis was placed on the adoption of Marxist archaeology throughout the country. These theoretical developments were subsequently adopted by archaeologists working in capitalist states outside of the Leninist bloc, most notably by the Australian academic V. Gordon Childe , who used Marxist theory in his understandings of the development of human society. Marxist sociology, as
16109-514: The analysis of crisis in capitalism, the role and distribution of the surplus product and surplus value in various types of economic systems , the nature and origin of economic value , the impact of class and class struggle on economic and political processes, and the process of economic evolution . Although the Marxian school is considered heterodox , ideas that have come out of Marxian economics have contributed to mainstream understanding of
16290-515: The appearance of moderately complex animals (comparable to earthworms ). Geochemical observations may help to deduce the global level of biological activity at a certain period, or the affinity of certain fossils. For example, geochemical features of rocks may reveal when life first arose on Earth, and may provide evidence of the presence of eukaryotic cells, the type from which all multicellular organisms are built. Analyses of carbon isotope ratios may help to explain major transitions such as
16471-429: The assumption being that evolution is somehow driving organisms to get more complex and ultimately more like humankind. Gould argued that evolution's drive was not towards complexity , but towards diversification . Because life is constrained to begin with a simple starting point (like bacteria), any diversity resulting from this start, by random walk, will have a skewed distribution and therefore be perceived to move in
16652-625: The atmosphere increased their effectiveness as nurseries of evolution. While eukaryotes , cells with complex internal structures, may have been present earlier, their evolution speeded up when they acquired the ability to transform oxygen from a poison to a powerful source of metabolic energy. This innovation may have come from primitive eukaryotes capturing oxygen-powered bacteria as endosymbionts and transforming them into organelles called mitochondria . The earliest evidence of complex eukaryotes with organelles (such as mitochondria) dates from 1,850 million years ago . Multicellular life
16833-414: The awareness—of itself and the social world—that a social class possesses and its capacity to act rationally in its best interests. Class consciousness is required before a social class can effect a successful revolution and, thus, the dictatorship of the proletariat . Without defining ideology , Marx used the term to describe the production of images of social reality. According to Engels, "ideology
17014-415: The bodies of ancient organisms might have worked, for example the running speed and bite strength of Tyrannosaurus , or the flight mechanics of Microraptor . It is relatively commonplace to study the internal details of fossils using X-ray microtomography . Paleontology, biology, archaeology, and paleoneurobiology combine to study endocranial casts (endocasts) of species related to humans to clarify
17195-417: The capitalist system. In Marxism, political economy is the study of the means of production, specifically of capital and how that manifests as economic activity. Marxism taught me what society was. I was like a blindfolded man in a forest, who doesn't even know where north or south is. If you don't eventually come to truly understand the history of the class struggle, or at least have a clear idea that society
17376-401: The causes of various types of change; and applying those theories to specific facts. When trying to explain the past, paleontologists and other historical scientists often construct a set of one or more hypotheses about the causes and then look for a " smoking gun ", a piece of evidence that strongly accords with one hypothesis over any others. Sometimes researchers discover a "smoking gun" by
17557-763: The characteristics and evolution of humans as a species. When dealing with evidence about humans, archaeologists and paleontologists may work together – for example paleontologists might identify animal or plant fossils around an archaeological site , to discover the people who lived there, and what they ate; or they might analyze the climate at the time of habitation. In addition, paleontology often borrows techniques from other sciences, including biology, osteology , ecology, chemistry , physics and mathematics. For example, geochemical signatures from rocks may help to discover when life first arose on Earth, and analyses of carbon isotope ratios may help to identify climate changes and even to explain major transitions such as
17738-520: The chronological order in which rocks were formed, is useful to both paleontologists and geologists. Biogeography studies the spatial distribution of organisms, and is also linked to geology, which explains how Earth's geography has changed over time. Although paleontology became established around 1800, earlier thinkers had noticed aspects of the fossil record. The ancient Greek philosopher Xenophanes (570–480 BCE) concluded from fossil sea shells that some areas of land were once under water. During
17919-415: The complex dynamics of modern society." Influenced by the thought of Karl Marx , Marxist sociology emerged in the late 19th and early 20th centuries. With Marx, Max Weber and Émile Durkheim are considered seminal influences in early sociology . The first Marxist school of sociology was known as Austro-Marxism , of which Carl Grünberg and Antonio Labriola were among its most notable members. During
18100-399: The concept that "the fastest possible growth of productive capital " was best for wealthy capitalists and workers because it provided them with employment. Exploitation is a matter of surplus labour —the amount of labour performed beyond what is received in goods. Exploitation has been a socioeconomic feature of every class society and is one of the principal features distinguishing
18281-469: The course. If a student was denied course enrollment three times, then their fourth entry into the lottery provided them with a guaranteed seat in the class. Shortly before his death, Gould published The Structure of Evolutionary Theory (2002), a long treatise recapitulating his version of modern evolutionary theory. In an interview for the Dutch TV series Of Beauty and Consolation Gould remarked, "In
18462-445: The date when lineages first appeared. For instance, if fossils of B or C date to X million years ago and the calculated "family tree" says A was an ancestor of B and C, then A must have evolved more than X million years ago. It is also possible to estimate how long ago two living clades diverged – i.e. approximately how long ago their last common ancestor must have lived – by assuming that DNA mutations accumulate at
18643-843: The defining characteristics of Marxism have often been described using the terms " dialectical materialism " and "historical materialism", though these terms were coined after Marx's death and their tenets have been challenged by some self-described Marxists. As a school of thought, Marxism has had a profound effect on society and global academia. To date, it has influenced many fields, including anthropology , archaeology , art theory , criminology , cultural studies , economics , education , ethics , film theory , geography , historiography , literary criticism , media studies , philosophy , political science , political economy , psychoanalysis , science studies , sociology , urban planning , and theatre . Marxism seeks to explain social phenomena within any given society by analysing
18824-594: The development of mammalian traits such as endothermy and hair. After the Cretaceous–Paleogene extinction event 66 million years ago killed off all the dinosaurs except the birds, mammals increased rapidly in size and diversity, and some took to the air and the sea. Fossil evidence indicates that flowering plants appeared and rapidly diversified in the Early Cretaceous between 130 million years ago and 90 million years ago . Their rapid rise to dominance of terrestrial ecosystems
19005-561: The development of the body plans of most animal phyla . The discovery of fossils of the Ediacaran biota and developments in paleobiology extended knowledge about the history of life back far before the Cambrian. Increasing awareness of Gregor Mendel 's pioneering work in genetics led first to the development of population genetics and then in the mid-20th century to the modern evolutionary synthesis , which explains evolution as
19186-482: The different levels of deposits represented different time periods in the early 19th century. The surface-level deposits in the Americas contained later mammals like the megatheriid ground sloth Megatherium and the mammutid proboscidean Mammut (later known informally as a "mastodon"), which were some of the earliest-named fossil mammal genera with official taxonomic authorities. They today are known to date to
19367-499: The direction of higher complexity. But life, Gould argued, can also easily adapt towards simplification, as is often the case with parasites . In a review of Full House , Richard Dawkins approved of Gould's general argument, but suggested that he saw evidence of a "tendency for lineages to improve cumulatively their adaptive fit to their particular way of life, by increasing the numbers of features which combine together in adaptive complexes. ... By this definition, adaptive evolution
19548-493: The doctrine that "man is the measure of all things"—that humans are essentially different to the rest of the natural order and should be treated so by Marxist theory. According to a 2007 survey of American professors by Neil Gross and Solon Simmons, 17.6% of social science professors and 5.0% of humanities professors identify as Marxists, while between 0 and 2% of professors in all other disciplines identify as Marxists. The theoretical development of Marxist archaeology
19729-499: The dominant method of classification in evolutionary biology. Inexpensive but increasingly powerful personal computers made it possible to process large quantities of data about organisms and their characteristics. Around the same time the development of effective polymerase chain reaction techniques made it possible to apply cladistic methods of analysis to biochemical and genetic features as well. Most of Gould's empirical research pertained to land snails . He focused his early work on
19910-425: The economic base that conditions both the superstructure and the dominant ideology of a society. Conflicts between the development of material productive forces and the relations of production provoke social revolutions , whereby changes to the economic base lead to the superstructure's social transformation . This relationship is reflexive in that the base initially gives rise to the superstructure and remains
20091-408: The end of class society, which Marx saw as the fundamental division of all hitherto existing history. Marx saw the fundamental nature of capitalist society as little different from that of a slave society in that one small group of society exploits the larger group. Through common ownership of the means of production, the profit motive is eliminated, and the motive of furthering human flourishing
20272-409: The end of the 20th century have been particularly important as they have provided new information about the earliest evolution of animals, early fish, dinosaurs and the evolution of birds. The last few decades of the 20th century saw a renewed interest in mass extinctions and their role in the evolution of life on Earth. There was also a renewed interest in the Cambrian explosion that apparently saw
20453-441: The evolution of life on earth. When dominance of an ecological niche passes from one group of organisms to another, this is rarely because the new dominant group outcompetes the old, but usually because an extinction event allows a new group, which may possess an advantageous trait, to outlive the old and move into its niche. Marxism Marxism is a political philosophy and method of socioeconomic analysis. It uses
20634-410: The evolution of the human brain. Paleontology even contributes to astrobiology , the investigation of possible life on other planets , by developing models of how life may have arisen and by providing techniques for detecting evidence of life. As knowledge has increased, paleontology has developed specialised subdivisions. Vertebrate paleontology concentrates on fossils from the earliest fish to
20815-466: The evolutionary history of life back to over 3,000 million years ago , possibly as far as 3,800 million years ago . The oldest clear evidence of life on Earth dates to 3,000 million years ago , although there have been reports, often disputed, of fossil bacteria from 3,400 million years ago and of geochemical evidence for the presence of life 3,800 million years ago . Some scientists have proposed that life on Earth
20996-555: The exceptional events that cause quick burial make it difficult to study the normal environments of the animals. The sparseness of the fossil record means that organisms are expected to exist long before and after they are found in the fossil record – this is known as the Signor–Lipps effect . Trace fossils consist mainly of tracks and burrows, but also include coprolites (fossil feces ) and marks left by feeding. Trace fossils are particularly significant because they represent
21177-405: The failure of socialist movements to resist the outbreak of World War I , led to renewed theoretical effort and valuable contributions from Lenin and Rosa Luxemburg towards an appreciation of Marx's crisis theory and efforts to formulate a theory of imperialism . Karl Marx criticised liberal democracy as not democratic enough due to the unequal socio-economic situation of the workers during
21358-463: The focus of paleontology shifted to understanding evolutionary paths, including human evolution , and evolutionary theory. The last half of the 19th century saw a tremendous expansion in paleontological activity, especially in North America. The trend continued in the 20th century with additional regions of the Earth being opened to systematic fossil collection. Fossils found in China near
21539-449: The following: At the end of the 18th century Georges Cuvier 's work established comparative anatomy as a scientific discipline and, by proving that some fossil animals resembled no living ones, demonstrated that animals could become extinct , leading to the emergence of paleontology. The expanding knowledge of the fossil record also played an increasing role in the development of geology, particularly stratigraphy . Cuvier proved that
21720-496: The forms and pedagogical processes of capitalist and communist education, such as Tyson E. Lewis, Noah De Lissovoy, Gregory Bourassa, and Derek R. Ford. Curry Malott has developed a Marxist history of education in the U.S., and Marvin Gettleman examined the history of communist education. Sandy Grande has synthesised Marxist educational theory with Indigenous pedagogy, while others like John Holt analyse adult education from
21901-580: The fossil record: different environments are more favorable to the preservation of different types of organism or parts of organisms. Further, only the parts of organisms that were already mineralised are usually preserved, such as the shells of molluscs. Since most animal species are soft-bodied, they decay before they can become fossilised. As a result, although there are 30-plus phyla of living animals, two-thirds have never been found as fossils. Occasionally, unusual environments may preserve soft tissues. These lagerstätten allow paleontologists to examine
22082-482: The foundation of a form of social organisation . Those newly formed social organisations can then act again upon both parts of the base and superstructure so that rather than being static, the relationship is dialectic , expressed and driven by conflicts and contradictions. Engels clarified: "The history of all hitherto existing society is the history of class struggles. Freeman and slave , patrician and plebeian , lord and serf , guild -master and journeyman , in
22263-405: The future in a similar manner as with capitalism. Marx distinguishes social classes based on two criteria, i.e. ownership of means of production and control over the labour power of others. Following this criterion of class based on property relations, Marx identified the social stratification of the capitalist mode of production with the following social groups: Class consciousness denotes
22444-552: The global economy. Certain concepts of Marxian economics, especially those related to capital accumulation and the business cycle , such as creative destruction , have been fitted for use in capitalist systems. Marxist education develops Marx's works and those of the movements he influenced in various ways. In addition to the educational psychology of Lev Vygotsky and the pedagogy of Paulo Freire , Samuel Bowles and Herbert Gintis' Schooling in Capitalist America
22625-687: The history and driving forces behind their evolution. Land plants were so successful that their detritus caused an ecological crisis in the Late Devonian , until the evolution of fungi that could digest dead wood. During the Permian period, synapsids , including the ancestors of mammals , may have dominated land environments, but this ended with the Permian–Triassic extinction event 251 million years ago , which came very close to wiping out all complex life. The extinctions were apparently fairly sudden, at least among vertebrates. During
22806-533: The history of Earth's climate and the mechanisms that have changed it – which have sometimes included evolutionary developments, for example the rapid expansion of land plants in the Devonian period removed more carbon dioxide from the atmosphere, reducing the greenhouse effect and thus helping to cause an ice age in the Carboniferous period. Biostratigraphy , the use of fossils to work out
22987-542: The immediate ancestors of modern mammals . Invertebrate paleontology deals with fossils such as molluscs , arthropods , annelid worms and echinoderms . Paleobotany studies fossil plants , algae , and fungi. Palynology , the study of pollen and spores produced by land plants and protists , straddles paleontology and botany , as it deals with both living and fossil organisms. Micropaleontology deals with microscopic fossil organisms of all kinds. Instead of focusing on individual organisms, paleoecology examines
23168-434: The index fossils turn out to have longer fossil ranges than first thought. Stratigraphy and biostratigraphy can in general provide only relative dating ( A was before B ), which is often sufficient for studying evolution. However, this is difficult for some time periods, because of the problems involved in matching up rocks of the same age across different continents . Family-tree relationships may also help to narrow down
23349-730: The institution's Museum of Comparative Zoology . In 1982, Harvard awarded him the title of Alexander Agassiz Professor of Zoology. That same year, he received the Golden Plate Award of the American Academy of Achievement . In 1983, he was awarded a fellowship at the American Association for the Advancement of Science , where he later served as president (1999–2001). The AAAS news release cited his "numerous contributions to both scientific progress and
23530-538: The interactions between different ancient organisms, such as their food chains , and the two-way interactions with their environments. For example, the development of oxygenic photosynthesis by bacteria caused the oxygenation of the atmosphere and hugely increased the productivity and diversity of ecosystems . Together, these led to the evolution of complex eukaryotic cells, from which all multicellular organisms are built. Paleoclimatology , although sometimes treated as part of paleoecology, focuses more on
23711-463: The internal anatomy of animals that in other sediments are represented only by shells, spines, claws, etc. – if they are preserved at all. However, even lagerstätten present an incomplete picture of life at the time. The majority of organisms living at the time are probably not represented because lagerstätten are restricted to a narrow range of environments, e.g. where soft-bodied organisms can be preserved very quickly by events such as mudslides; and
23892-456: The investigation of evolutionary "family trees" by techniques derived from biochemistry , began to make an impact, particularly when it was proposed that the human lineage had diverged from apes much more recently than was generally thought at the time. Although this early study compared proteins from apes and humans, most molecular phylogenetics research is now based on comparisons of RNA and DNA . Fossils of organisms' bodies are usually
24073-550: The latter claiming that Marx himself was a libertarian Marxist. Marxist humanism was born in 1932 with the publication of Marx's Economic and Philosophic Manuscripts of 1844 and reached a degree of prominence in the 1950s and 1960s. Marxist humanists contend that there is continuity between the early philosophical writings of Marx, in which he develops his theory of alienation , and the structural description of capitalist society found in his later works, such as Capital . They hold that grasping Marx's philosophical foundations
24254-426: The level of class struggle . Under the capitalist mode of production , this struggle materialises between the minority who own the means of production (the bourgeoisie ) and the vast majority of the population who produce goods and services (the proletariat ). Starting with the conjectural premise that social change occurs due to the struggle between different classes within society who contradict one another,
24435-409: The logic that, if groups B and C have more similarities to each other than either has to group A, then B and C are more closely related to each other than either is to A. Characters that are compared may be anatomical , such as the presence of a notochord , or molecular , by comparing sequences of DNA or proteins . The result of a successful analysis is a hierarchy of clades – groups that share
24616-570: The material conditions and economic activities required to fulfill human material needs. It assumes that the form of economic organisation, or mode of production , influences all other social phenomena, including broader social relations, political institutions, legal systems, cultural systems, aesthetics and ideologies. These social relations and the economic system form a base and superstructure . As forces of production (i.e. technology ) improve, existing forms of organising production become obsolete and hinder further progress. Karl Marx wrote: "At
24797-409: The most informative type of evidence. The most common types are wood, bones, and shells. Fossilisation is a rare event, and most fossils are destroyed by erosion or metamorphism before they can be observed. Hence the fossil record is very incomplete, increasingly so further back in time. Despite this, it is often adequate to illustrate the broader patterns of life's history. There are also biases in
24978-407: The necessities of life. The worker's entry into such employment is voluntary because they choose which capitalist to work for. However, the worker must work or starve. Thus, exploitation is inevitable, and the voluntary nature of a worker participating in a capitalist society is illusory; it is production, not circulation, that causes exploitation. Marx emphasised that capitalism per se does not cheat
25159-511: The objective laws governing the development of the system of social relations. ... in the second place, the earlier theories did not cover the activities of the masses of the population, whereas historical materialism made it possible for the first time to study with scientific accuracy the social conditions of the life of the masses and the changes in these conditions. — Russian Marxist theoretician and revolutionary Vladimir Lenin , 1913 Society does not consist of individuals, but expresses
25340-414: The outcome of events such as mutations and horizontal gene transfer , which provide genetic variation , with genetic drift and natural selection driving changes in this variation over time. Within the next few years the role and operation of DNA in genetic inheritance were discovered, leading to what is now known as the "Central Dogma" of molecular biology . In the 1960s molecular phylogenetics ,
25521-418: The paleontological record as being characterized by predominantly gradual change (which he termed horotely), although he also documented examples of slow (bradytely), and rapid (tachytely) rates of evolution. Punctuated equilibrium and phyletic gradualism are not mutually exclusive (as Simpson's work demonstrates), and examples of each have been documented in different lineages. The debate between these two models
25702-530: The party. Classical Marxism denotes the collection of socio-eco-political theories expounded by Karl Marx and Friedrich Engels . As Ernest Mandel remarked, "Marxism is always open, always critical, always self-critical." Classical Marxism distinguishes Marxism as broadly perceived from "what Marx believed." In 1883, Marx wrote to his son-in-law Paul Lafargue and French labour leader Jules Guesde —both of whom claimed to represent Marxist principles—accusing them of "revolutionary phrase-mongering" and denying
25883-434: The population's living standards due to its need to compensate for the falling rate of profit by cutting employees' wages and social benefits while pursuing military aggression. The socialist mode of production would succeed capitalism as humanity's mode of production through revolution by workers. According to Marxian crisis theory , socialism is not an inevitability but an economic necessity. The term Marxism
26064-438: The presence of transitional fossils or forms: It is infuriating to be quoted again and again by creationists—whether through design or stupidity, I do not know—as admitting that the fossil record includes no transitional forms. Transitional forms are generally lacking at the species level but are abundant between larger groups. The evolution from reptiles to mammals . . . is well documented. An anti-evolution petition drafted by
26245-452: The principal types of evidence about ancient life, and geochemical evidence has helped to decipher the evolution of life before there were organisms large enough to leave body fossils. Estimating the dates of these remains is essential but difficult: sometimes adjacent rock layers allow radiometric dating , which provides absolute dates that are accurate to within 0.5%, but more often paleontologists have to rely on relative dating by solving
26426-484: The process of heterochrony , which encompasses two distinct processes: neoteny and terminal additions. Neoteny is the process where ontogeny is slowed down and the organism does not reach the end of its development. Terminal addition is the process by which an organism adds to its development by speeding and shortening earlier stages in the developmental process. Gould's influence in the field of evolutionary developmental biology continues to be seen today in areas such as
26607-500: The product enslaves first the producer, and then the appropriator, is replaced by the mode of appropriation of the products that is based upon the nature of the modern means of production; upon the one hand, direct social appropriation, as means to the maintenance and extension of production—on the other, direct individual appropriation, as means of subsistence and of enjoyment." Marxian economics and its proponents view capitalism as economically unsustainable and incapable of improving
26788-747: The public understanding of science." He also served as president of the Paleontological Society (1985–1986) and of the Society for the Study of Evolution (1990–1991). In 1989, Gould was elected into the body of the National Academy of Sciences . Through 1996–2002 Gould was Vincent Astor Visiting research professor of biology at New York University . In 2001, the American Humanist Association named him
26969-432: The radioactive element was incorporated into the rock. Radioactive elements are common only in rocks with a volcanic origin, and so the only fossil-bearing rocks that can be dated radiometrically are a few volcanic ash layers. Consequently, paleontologists must usually rely on stratigraphy to date fossils. Stratigraphy is the science of deciphering the "layer-cake" that is the sedimentary record, and has been compared to
27150-701: The same approach as historical scientists: construct a set of hypotheses about the causes and then look for a "smoking gun". Paleontology lies between biology and geology since it focuses on the record of past life, but its main source of evidence is fossils in rocks. For historical reasons, paleontology is part of the geology department at many universities: in the 19th and early 20th centuries, geology departments found fossil evidence important for dating rocks, while biology departments showed little interest. Paleontology also has some overlap with archaeology , which primarily works with objects made by humans and with human remains, while paleontologists are interested in
27331-597: The scholarly debate about which island Columbus had first set foot on in America. Gould is one of the most frequently cited scientists in the field of evolutionary theory. His 1979 "spandrels" paper has been cited more than 5,000 times. In Paleobiology —the flagship journal of his own speciality—only Charles Darwin and George Gaylord Simpson have been cited more often. Gould was also a considerably respected historian of science. Historian Ronald Numbers has been quoted as saying: "I can't say much about Gould's strengths as
27512-478: The similarity of the DNA in their genomes . Molecular phylogenetics has also been used to estimate the dates when species diverged, but there is controversy about the reliability of the molecular clock on which such estimates depend. The simplest definition of "paleontology" is "the study of ancient life". The field seeks information about several aspects of past organisms: "their identity and origin, their environment and evolution, and what they can tell us about
27693-470: The slow recovery from this catastrophe a previously obscure group, archosaurs , became the most abundant and diverse terrestrial vertebrates. One archosaur group, the dinosaurs, were the dominant land vertebrates for the rest of the Mesozoic , and birds evolved from one group of dinosaurs. During this time mammals' ancestors survived only as small, mainly nocturnal insectivores , which may have accelerated
27874-415: The social classes. The power of one social class to control the means of production enables its exploitation of other classes. Under capitalism, the labour theory of value is the operative concern, whereby the value of a commodity equals the socially necessary labour time required to produce it. Under such conditions, surplus value —the difference between the value produced and the value received by
28055-603: The society) would abolish the exploitative working conditions experienced under capitalism. Through working class revolution, the state (which Marxists saw as a weapon for the subjugation of one class by another) is seized and used to suppress the hitherto ruling class of capitalists and (by implementing a commonly owned, democratically controlled workplace) create the society of communism which Marxists see as true democracy. An economy based on cooperation on human need and social betterment, rather than competition for profit of many independently acting profit seekers, would also be
28236-463: The spandrels of the San Marco cathedral, while quite beautiful, were not spaces planned by the architect. Rather the spaces arise as "necessary architectural byproducts of mounting a dome on rounded arches." Gould and Lewontin thus defined " spandrels " in the evolutionary biology context to mean any biological feature of an organism that arises as a necessary side consequence of other features, which
28417-631: The study of anatomically modern humans . It now uses techniques drawn from a wide range of sciences, including biochemistry , mathematics , and engineering. Use of all these techniques has enabled paleontologists to discover much of the evolutionary history of life , almost back to when Earth became capable of supporting life, nearly 4 billion years ago. As knowledge has increased, paleontology has developed specialised sub-divisions, some of which focus on different types of fossil organisms while others study ecology and environmental history, such as ancient climates . Body fossils and trace fossils are
28598-474: The study of sociology from a Marxist perspective, is "a form of conflict theory associated with ... Marxism's objective of developing a positive ( empirical ) science of capitalist society as part of the mobilisation of a revolutionary working class ." The American Sociological Association has a section dedicated to the issues of Marxist sociology that is "interested in examining how insights from Marxist methodology and Marxist analysis can help explain
28779-461: The successful lawsuit of HIV activist Jim Wakeford , who sued the Government of Canada for the right to cultivate, possess, and use marijuana for medical purposes. In February 2002, a 3-centimeter (1.2 in) lesion was found on Gould's chest radiograph , and oncologists diagnosed him with stage IV cancer. Gould died 10 weeks later on May 20, 2002, from a metastatic adenocarcinoma of
28960-412: The sum of interrelations, the relations within which these individuals stand. Marxism uses a materialist methodology, referred to by Marx and Engels as the materialist conception of history and later better known as historical materialism, to analyse the underlying causes of societal development and change from the perspective of the collective ways in which humans make their living. Marx's account of
29141-629: The systematic study of fossils emerged as an integral part of the changes in natural philosophy that occurred during the Age of Reason . In the Italian Renaissance, Leonardo da Vinci made various significant contributions to the field as well as depicted numerous fossils. Leonardo's contributions are central to the history of paleontology because he established a line of continuity between the two main branches of paleontology – ichnology and body fossil paleontology. He identified
29322-640: The term "non-overlapping magisteria" (NOMA) to describe how, in his view, science and religion should not comment on each other's realm. Gould went on to develop this idea in some detail, particularly in the books Rocks of Ages (1999) and The Hedgehog, the Fox, and the Magister's Pox (2003). In a 1982 essay for Natural History Gould wrote: Our failure to discern a universal good does not record any lack of insight or ingenuity, but merely demonstrates that nature contains no moral messages framed in human terms. Morality
29503-411: The term spandrel instead of pendentive, a spandrel that curves across a right angle to support a dome. Robert Mark, a professor of civil engineering at Princeton, offered his expertise in the pages of American Scientist , noting that these definitions are often misunderstood in architectural theory . Mark concluded, "Gould and Lewontin's misapplication of the term spandrel for pendentive perhaps implies
29684-613: The theory is in The German Ideology (1845) and the preface A Contribution to the Critique of Political Economy (1859). All constituent features of a society ( social classes , political pyramid and ideologies ) are assumed to stem from economic activity, forming what is considered the base and superstructure . The base and superstructure metaphor describes the totality of social relations by which humans produce and re-produce their social existence. According to Marx,
29865-484: The value of reformist struggle. From Marx's letter derives Marx's famous remark that, if their politics represented Marxism, ' ce qu'il y a de certain c'est que moi, je ne suis pas Marxiste ' ('what is certain is that I myself am not a Marxist')." Libertarian Marxism emphasises the anti-authoritarian and libertarian aspects of Marxism. Early currents of libertarian Marxism, such as left communism , emerged in opposition to Marxism–Leninism . Libertarian Marxism
30046-399: The vexatious problem of altruism —previously the greatest stumbling block to a Darwinian theory of social behavior... Here sociobiology has had and will continue to have success. And here I wish it well. For it represents an extension of basic Darwinism to a realm where it should apply." With Richard Lewontin, Gould wrote an influential 1979 paper entitled, " The Spandrels of San Marco and
30227-510: The visual arts, and music where, unlike in biological systems, the realm of aesthetic possibilities is constrained by a "right wall" of human limits and aesthetic preferences. Gould later goes on to state that his arguments for biological evolution should not be applied to cultural change lest they be employed by, "so-called 'political correctness' as a doctrine that celebrates all indigenous practice, and therefore permits no distinctions, judgements, or analyses." Gould never embraced cladistics as
30408-406: The word "palaeontology" to refer to the study of ancient living organisms through fossils. As knowledge of life's history continued to improve, it became increasingly obvious that there had been some kind of successive order to the development of life. This encouraged early evolutionary theories on the transmutation of species . After Charles Darwin published Origin of Species in 1859, much of
30589-432: The worker. Alienation ( German : Entfremdung ) is the estrangement of people from their humanity and a systematic result of capitalism. Under capitalism, the fruits of production belong to employers, who expropriate the surplus created by others and generate alienated labourers. In Marx's view, alienation is an objective characterisation of the worker's situation in capitalism—his or her self-awareness of this condition
30770-454: Was "seeded" from elsewhere , but most research concentrates on various explanations of how life could have arisen independently on Earth. For about 2,000 million years microbial mats , multi-layered colonies of different bacteria, were the dominant life on Earth. The evolution of oxygenic photosynthesis enabled them to play the major role in the oxygenation of the atmosphere from about 2,400 million years ago . This change in
30951-694: Was "of great interest to biology generally," it merely modified neo-Darwinism in a manner that was fully compatible with what had been known before. Other biologists emphasize the theoretical novelty of punctuated equilibrium, and argued that evolutionary stasis had been "unexpected by most evolutionary biologists" and "had a major impact on paleontology and evolutionary biology." Comparisons were made to George Gaylord Simpson 's work in Tempo and Mode in Evolution (1941), in which he also illustrated relatively sudden changes along evolutionary lines. Simpson describes
31132-452: Was active in the civil rights movement and often campaigned for social justice . When he attended the University of Leeds as a visiting undergraduate, he organized weekly demonstrations outside a Bradford dance hall which refused to admit black people . Gould continued these demonstrations until the policy was revoked. Throughout his career and writings, he spoke out against cultural oppression in all its forms, especially what he saw as
31313-510: Was also an advocate of medical cannabis . When undergoing his cancer treatments he smoked marijuana to help alleviate the long periods of intense and uncontrollable nausea. According to Gould, the drug had a "most important effect" on his eventual recovery. He later complained that he could not understand how "any humane person would withhold such a beneficial substance from people in such great need simply because others use it for different purposes." On August 5, 1998, Gould's testimony assisted in
31494-472: Was an agnostic in Skeptic magazine, he responded: If you absolutely forced me to bet on the existence of a conventional anthropomorphic deity, of course I'd bet no. But, basically, Huxley was right when he said that agnosticism is the only honorable position because we really cannot know. And that's right. I'd be real surprised if there turned out to be a conventional God. Though he "had been brought up by
31675-752: Was contrasted against phyletic gradualism , the popular idea that evolutionary change is marked by a pattern of smooth and continuous change in the fossil record. Most of Gould's empirical research was based on the land snail genera Poecilozonites and Cerion . He also made important contributions to evolutionary developmental biology , receiving broad professional recognition for his book Ontogeny and Phylogeny . In evolutionary theory he opposed strict selectionism, sociobiology as applied to humans, and evolutionary psychology . He campaigned against creationism and proposed that science and religion should be considered two distinct fields (or " non-overlapping magisteria ") whose authorities do not overlap. Gould
31856-598: Was featured prominently as a guest in Ken Burns 's PBS documentary Baseball , as well as PBS's Evolution series. Gould was also on the Board of Advisers to the influential Children's Television Workshop television show 3-2-1 Contact , where he made frequent guest appearances. Since 2013, Gould has been listed on the Advisory Council of the National Center for Science Education . In 1997, he voiced
32037-462: Was first developed in the Soviet Union in 1929, when a young archaeologist named Vladislav I. Ravdonikas published a report entitled "For a Soviet history of material culture"; within this work, the very discipline of archaeology as it then stood was criticised as being inherently bourgeois, therefore anti-socialist and so, as a part of the academic reforms instituted in the Soviet Union under
32218-591: Was hired as the Vincent Astor Visiting Research Professor of Biology at New York University , after which he divided his time teaching between there and Harvard. Gould's most significant contribution to evolutionary biology was the theory of punctuated equilibrium developed with Niles Eldredge in 1972. The theory proposes that most evolution is characterized by long periods of evolutionary stability, infrequently punctuated by swift periods of branching speciation . The theory
32399-513: Was known by the general public mainly for his 300 popular essays in Natural History magazine, and his numerous books written for both the specialist and non-specialist. In April 2000, the US Library of Congress named him a " Living Legend ". Stephen Jay Gould was born in Queens , New York , on September 10, 1941. His father Leonard was a court stenographer and a World War II veteran of
32580-693: Was popularised by Karl Kautsky , who considered himself an orthodox Marxist during the dispute between Marx's orthodox and revisionist followers. Kautsky's revisionist rival Eduard Bernstein also later adopted the term. Engels did not support using Marxism to describe either Marx's or his views. He claimed that the term was being abusively used as a rhetorical qualifier by those attempting to cast themselves as genuine followers of Marx while casting others in different terms, such as Lassallians . In 1882, Engels claimed that Marx had criticised self-proclaimed Marxist Paul Lafargue by saying that if Lafargue's views were considered Marxist, then "one thing
32761-427: Was to artist and sculptor Rhonda Roland Shearer . In July 1982 Gould was diagnosed with peritoneal mesothelioma , a deadly form of cancer affecting the abdominal lining (the peritoneum ). This cancer is frequently found in people who have ingested or inhaled asbestos fibers, a mineral which was used in the construction of Harvard's Museum of Comparative Zoology. After a difficult two-year recovery, Gould published
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