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123-398: The Atsugewi traditionally lived by hunting and gathering and lived in small groups without centralized political authority. There was a cultural division into two smaller bands, based on the area of habitation. Inhabitants of Hat Creek were known as the "pine tree people" or Atsuge. In turn the residents of Apwariwa or Dixie Valley were known as the "juniper tree people" or Mahuopani; or by

246-415: A multi-layered network of cooperating, distinct, or even competing social groups – from families and peer groups to corporations and political states . As such, social interactions between humans have established a wide variety of values, social norms , languages , and traditions (collectively termed institutions ), each of which bolsters human society . Humans are also highly curious , with

369-668: A theory of mind . The human mind is capable of introspection , private thought , imagination , volition , and forming views on existence . This has allowed great technological advancements and complex tool development through complex reasoning and the transmission of knowledge to subsequent generations through language . Humans have had a dramatic effect on the environment . They are apex predators , being rarely preyed upon by other species. Human population growth , industrialization, land development, overconsumption and combustion of fossil fuels have led to environmental destruction and pollution that significantly contributes to

492-443: A consequence of better nutrition, healthcare, and living conditions. The average mass of an adult human is 59 kg (130 lb) for females and 77 kg (170 lb) for males. Like many other conditions, body weight and body type are influenced by both genetic susceptibility and environment and varies greatly among individuals. Humans have a far faster and more accurate throw than other animals. Humans are also among

615-518: A day, whereas people in agricultural and industrial societies work on average 8.8 hours a day. Sahlins' theory has been criticized for only including time spent hunting and gathering while omitting time spent on collecting firewood, food preparation, etc. Other scholars also assert that hunter-gatherer societies were not "affluent" but suffered from extremely high infant mortality, frequent disease, and perennial warfare. Researchers Gurven and Kaplan have estimated that around 57% of hunter-gatherers reach

738-559: A diet high in protein and low in other macronutrients results in the body using the protein as energy, possibly leading to protein deficiency. Lean meat especially becomes a problem when animals go through a lean season that requires them to metabolize fat deposits. In areas where plant and fish resources are scarce, hunter-gatherers may trade meat with horticulturalists for carbohydrates . For example, tropical hunter-gatherers may have an excess of protein but be deficient in carbohydrates, and conversely tropical horticulturalists may have

861-419: A few other places), saw the emergence of agriculture and permanent human settlement ; in turn, this led to the development of civilization and kickstarted a period of continuous (and ongoing) population growth and rapid technological change . Since then, a number of civilizations have risen and fallen, while a number of sociocultural and technological developments have resulted in significant changes to

984-463: A great capacity for altering their habitats by means of technology, irrigation , urban planning , construction, deforestation and desertification . Human settlements continue to be vulnerable to natural disasters , especially those placed in hazardous locations and with low quality of construction. Grouping and deliberate habitat alteration is often done with the goals of providing protection, accumulating comforts or material wealth, expanding

1107-612: A higher body fat percentage. At puberty , humans develop secondary sex characteristics . Females are capable of pregnancy , usually between puberty, at around 12 years old, and menopause , around the age of 50. As omnivorous creatures, they are capable of consuming a wide variety of plant and animal material, and have used fire and other forms of heat to prepare and cook food since the time of Homo erectus . Humans can survive for up to eight weeks without food and several days without water . Humans are generally diurnal , sleeping on average seven to nine hours per day. Childbirth

1230-475: A human can lose personhood (such as by going into a persistent vegetative state ). Humans are apes ( superfamily Hominoidea ). The lineage of apes that eventually gave rise to humans first split from gibbons (family Hylobatidae) and orangutans (genus Pongo ), then gorillas (genus Gorilla ), and finally, chimpanzees and bonobos (genus Pan ). The last split, between the human and chimpanzee–bonobo lineages, took place around 8–4 million years ago, in

1353-581: A more barrel-shaped chests in contrast to the funnel shape of other apes, an adaptation for bipedal respiration. Apart from bipedalism and brain size, humans differ from chimpanzees mostly in smelling , hearing and digesting proteins . While humans have a density of hair follicles comparable to other apes, it is predominantly vellus hair , most of which is so short and wispy as to be practically invisible. Humans have about 2 million sweat glands spread over their entire bodies, many more than chimpanzees, whose sweat glands are scarce and are mainly located on

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1476-781: A more constant supply of sustenance. In 2018, 9000-year-old remains of a female hunter along with a toolkit of projectile points and animal processing implements were discovered at the Andean site of Wilamaya Patjxa, Puno District in Peru . A 2020 study inspired by this discovery found that of 27 identified burials with hunter gatherers of a known sex who were also buried with hunting tools, 11 were female hunter gatherers, while 16 were male hunter gatherers. Combined with uncertainties, these findings suggest that anywhere from 30 to 50 percent of big game hunters were female. A 2023 study that looked at studies of contemporary hunter gatherer societies from

1599-504: A much clearer picture of life at the time. Between the 8th and 6th century BCE, Europe entered the classical antiquity age, a period when ancient Greece and ancient Rome flourished. Around this time other civilizations also came to prominence. The Maya civilization started to build cities and create complex calendars . In Africa, the Kingdom of Aksum overtook the declining Kingdom of Kush and facilitated trade between India and

1722-511: A paper entitled, " Notes on the Original Affluent Society ", in which he challenged the popular view of hunter-gatherers lives as "solitary, poor, nasty, brutish and short", as Thomas Hobbes had put it in 1651. According to Sahlins, ethnographic data indicated that hunter-gatherers worked far fewer hours and enjoyed more leisure than typical members of industrial society, and they still ate well. Their "affluence" came from

1845-451: A result, humans are a cosmopolitan species found in almost all regions of the world, including tropical rainforest , arid desert , extremely cold arctic regions , and heavily polluted cities; in comparison, most other species are confined to a few geographical areas by their limited adaptability. The human population is not, however, uniformly distributed on the Earth 's surface, because

1968-639: A similar species. Migrating out of Africa , they gradually replaced and interbred with local populations of archaic humans. Multiple hypotheses for the extinction of archaic human species such as Neanderthals include competition, violence , interbreeding with Homo sapiens , or inability to adapt to climate change . Humans began exhibiting behavioral modernity about 160,000–60,000 years ago. For most of their history, humans were nomadic hunter-gatherers. The Neolithic Revolution , which began in Southwest Asia around 13,000 years ago (and separately in

2091-515: A simple linear or branched progression but involved interbreeding between related species . Genomic research has shown that hybridization between substantially diverged lineages was common in human evolution. DNA evidence suggests that several genes of Neanderthal origin are present among all non sub-Saharan-African populations, and Neanderthals and other hominins, such as Denisovans , may have contributed up to 6% of their genome to present-day non sub-Saharan-African humans. Human evolution

2214-599: A size of a few dozen people. It remained the only mode of subsistence until the end of the Mesolithic period some 10,000 years ago, and after this was replaced only gradually with the spread of the Neolithic Revolution . The Late Pleistocene witnessed the spread of modern humans outside of Africa as well as the extinction of all other human species. Humans spread to the Australian continent and

2337-405: A smaller selection of (often larger) game and gathering a smaller selection of food. This specialization of work also involved creating specialized tools such as fishing nets , hooks, and bone harpoons . The transition into the subsequent Neolithic period is chiefly defined by the unprecedented development of nascent agricultural practices. Agriculture originated as early as 12,000 years ago in

2460-451: A successful labor increased significantly during the 20th century in wealthier countries with the advent of new medical technologies. In contrast, pregnancy and natural childbirth remain hazardous ordeals in developing regions of the world, with maternal death rates approximately 100 times greater than in developed countries. Both the mother and the father provide care for human offspring, in contrast to other primates, where parental care

2583-432: A surplus of carbohydrates but inadequate protein. Trading may thus be the most cost-effective means of acquiring carbohydrate resources. Hunter-gatherer societies manifest significant variability, depending on climate zone / life zone , available technology, and societal structure. Archaeologists examine hunter-gatherer tool kits to measure variability across different groups. Collard et al. (2005) found temperature to be

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2706-490: A sustainable manner for centuries. California Indians view the idea of wilderness in a negative light. They believe that wilderness is the result of humans losing their knowledge of the natural world and how to care for it. When the earth turns back to wilderness after the connection with humans is lost then the plants and animals will retreat and hide from the humans. Human Humans ( Homo sapiens , meaning "thinking man" or "wise man") or modern humans are

2829-497: A wide geographical area, thus there were regional variations in lifestyles. However, all the individual groups shared a common style of stone tool production, making knapping styles and progress identifiable. This early Paleo-Indian period lithic reduction tool adaptations have been found across the Americas, utilized by highly mobile bands consisting of approximately 25 to 50 members of an extended family. The Archaic period in

2952-406: A wide variety of plant and animal material. Human groups have adopted a range of diets from purely vegan to primarily carnivorous . In some cases, dietary restrictions in humans can lead to deficiency diseases ; however, stable human groups have adapted to many dietary patterns through both genetic specialization and cultural conventions to use nutritionally balanced food sources. The human diet

3075-511: Is 38 weeks, but a normal pregnancy can vary by up to 37 days. Embryonic development in the human covers the first eight weeks of development; at the beginning of the ninth week the embryo is termed a fetus . Humans are able to induce early labor or perform a caesarean section if the child needs to be born earlier for medical reasons. In developed countries, infants are typically 3–4 kg (7–9 lb) in weight and 47–53 cm (19–21 in) in height at birth. However, low birth weight

3198-449: Is a common practice among most vertebrates that are omnivores . Hunter-gatherer societies stand in contrast to the more sedentary agricultural societies , which rely mainly on cultivating crops and raising domesticated animals for food production, although the boundaries between the two ways of living are not completely distinct. Hunting and gathering was humanity's original and most enduring successful competitive adaptation in

3321-485: Is a mixture of the two parental sets. Among the 23 pairs of chromosomes, there are 22 pairs of autosomes and one pair of sex chromosomes . Like other mammals, humans have an XY sex-determination system , so that females have the sex chromosomes XX and males have XY. Genes and environment influence human biological variation in visible characteristics, physiology, disease susceptibility and mental abilities. The exact influence of genes and environment on certain traits

3444-424: Is a population decline in the winter months of this realm. Humans established nation-states in the other seven realms, such as South Africa , India , Russia , Australia , Fiji , United States and Brazil (each located in a different biogeographical realm). By using advanced tools and clothing , humans have been able to extend their tolerance to a wide variety of temperatures, humidities , and altitudes. As

3567-402: Is characterized by a number of morphological , developmental , physiological , and behavioral changes that have taken place since the split between the last common ancestor of humans and chimpanzees . The most significant of these adaptations are hairlessness , obligate bipedalism, increased brain size and decreased sexual dimorphism ( neoteny ). The relationship between all these changes

3690-456: Is common in developing countries, and contributes to the high levels of infant mortality in these regions. Compared with other species, human childbirth is dangerous, with a much higher risk of complications and death. The size of the fetus's head is more closely matched to the pelvis than in other primates. The reason for this is not completely understood, but it contributes to a painful labor that can last 24 hours or more. The chances of

3813-421: Is dangerous, with a high risk of complications and death . Often, both the mother and the father provide care for their children, who are helpless at birth . Humans have a large, highly developed, and complex prefrontal cortex , the region of the brain associated with higher cognition. Humans are highly intelligent and capable of episodic memory ; they have flexible facial expressions, self-awareness , and

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3936-479: Is generally aging, with the median age around 40 years. In the developing world , the median age is between 15 and 20 years. While one in five Europeans is 60 years of age or older, only one in twenty Africans is 60 years of age or older. In 2012, the United Nations estimated that there were 316,600 living centenarians (humans of age 100 or older) worldwide. Humans are omnivorous , capable of consuming

4059-443: Is inherited only from the mother, geneticists have concluded that the last female common ancestor whose genetic marker is found in all modern humans, the so-called mitochondrial Eve , must have lived around 90,000 to 200,000 years ago. Most human reproduction takes place by internal fertilization via sexual intercourse , but can also occur through assisted reproductive technology procedures. The average gestation period

4182-685: Is inhospitable to large scale economic exploitation and maintain their subsistence based on hunting and gathering, as well as incorporating a small amount of manioc horticulture that supplements, but is not replacing, reliance on foraged foods. Evidence suggests big-game hunter-gatherers crossed the Bering Strait from Asia (Eurasia) into North America over a land bridge ( Beringia ), that existed between 47,000 and 14,000 years ago. Around 18,500–15,500 years ago, these hunter-gatherers are believed to have followed herds of now-extinct Pleistocene megafauna along ice-free corridors that stretched between

4305-408: Is mostly done by the mother. Helpless at birth , humans continue to grow for some years, typically reaching sexual maturity at 15 to 17 years of age. The human life span has been split into various stages ranging from three to twelve. Common stages include infancy , childhood , adolescence , adulthood and old age . The lengths of these stages have varied across cultures and time periods but

4428-409: Is never total but is striking when viewed in an evolutionary context. One of humanity's two closest primate relatives, chimpanzees , are anything but egalitarian, forming themselves into hierarchies that are often dominated by an alpha male . So great is the contrast with human hunter-gatherers that it is widely argued by paleoanthropologists that resistance to being dominated was a key factor driving

4551-456: Is not necessarily a one-way process. It has been argued that hunting and gathering represents an adaptive strategy , which may still be exploited, if necessary, when environmental change causes extreme food stress for agriculturalists. In fact, it is sometimes difficult to draw a clear line between agricultural and hunter-gatherer societies, especially since the widespread adoption of agriculture and resulting cultural diffusion that has occurred in

4674-521: Is not well understood. While no humans – not even monozygotic twins  – are genetically identical, two humans on average will have a genetic similarity of 99.5%-99.9%. This makes them more homogeneous than other great apes, including chimpanzees. This small variation in human DNA compared to many other species suggests a population bottleneck during the Late Pleistocene (around 100,000 years ago), in which

4797-405: Is the field of study whereby food plants of various peoples and tribes worldwide are documented. Most hunter-gatherers are nomadic or semi-nomadic and live in temporary settlements. Mobile communities typically construct shelters using impermanent building materials, or they may use natural rock shelters, where they are available. Some hunter-gatherer cultures, such as the indigenous peoples of

4920-445: Is the subject of ongoing debate. Hylobatidae ( gibbons ) Pongo abelii Pongo tapanuliensis Pongo pygmaeus Gorilla gorilla Gorilla beringei Pan troglodytes Pan paniscus Homo sapiens (humans) Until about 12,000 years ago, all humans lived as hunter-gatherers . The Neolithic Revolution (the invention of agriculture ) first took place in Southwest Asia and spread through large parts of

5043-654: Is typified by an unusually rapid growth spurt during adolescence. Human females undergo menopause and become infertile at around the age of 50. It has been proposed that menopause increases a woman's overall reproductive success by allowing her to invest more time and resources in her existing offspring, and in turn their children (the grandmother hypothesis ), rather than by continuing to bear children into old age. The life span of an individual depends on two major factors, genetics and lifestyle choices. For various reasons, including biological/genetic causes, women live on average about four years longer than men. As of 2018 ,

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5166-548: The British Empire expanded to become the world's largest empire . A tenuous balance of power among European nations collapsed in 1914 with the outbreak of the First World War , one of the deadliest conflicts in history. In the 1930s, a worldwide economic crisis led to the rise of authoritarian regimes and a Second World War , involving almost all of the world's countries . The war's destruction led to

5289-524: The Caral–Supe civilization is the oldest complex civilization in the Americas. Astronomy and mathematics were also developed and the Great Pyramid of Giza was built. There is evidence of a severe drought lasting about a hundred years that may have caused the decline of these civilizations, with new ones appearing in the aftermath. Babylonians came to dominate Mesopotamia while others, such as

5412-511: The Church would provide centralized authority and education. In the Middle East, Islam became the prominent religion and expanded into North Africa. It led to an Islamic Golden Age , inspiring achievements in architecture , the revival of old advances in science and technology, and the formation of a distinct way of life. The Christian and Islamic worlds would eventually clash, with

5535-477: The Fertile Crescent , Ancient India , Ancient China , Olmec , Sub-Saharan Africa and Norte Chico . As a result of the now near-universal human reliance upon agriculture, the few contemporary hunter-gatherer cultures usually live in areas unsuitable for agricultural use. Archaeologists can use evidence such as stone tool use to track hunter-gatherer activities, including mobility. Ethnobotany

5658-474: The Homo genus. The name " Homo sapiens " means 'wise man' or 'knowledgeable man'. There is disagreement if certain extinct members of the genus, namely Neanderthals , should be included as a separate species of humans or as a subspecies of H. sapiens . Human is a loanword of Middle English from Old French humain , ultimately from Latin hūmānus , the adjectival form of homō ('man' – in

5781-570: The Ju'/hoansi people of Namibia, women help men track down quarry. In the Australian Martu, both women and men participate in hunting but with a different style of gendered division; while men are willing to take more risks to hunt bigger animals such as kangaroo for political gain as a form of "competitive magnanimity", women target smaller game such as lizards to feed their children and promote working relationships with other women, preferring

5904-579: The Kingdom of England , the Kingdom of France and the Holy Roman Empire declaring a series of holy wars to regain control of the Holy Land from Muslims . In the Americas, between 200 and 900 CE Mesoamerica was in its Classic Period , while further north, complex Mississippian societies would arise starting around 800 CE. The Mongol Empire would conquer much of Eurasia in the 13th and 14th centuries. Over this same time period,

6027-838: The Laurentide and Cordilleran ice sheets. Another route proposed is that, either on foot or using primitive boats , they migrated down the Pacific coast to South America. Hunter-gatherers would eventually flourish all over the Americas, primarily based in the Great Plains of the United States and Canada, with offshoots as far east as the Gaspé Peninsula on the Atlantic coast , and as far south as Chile , Monte Verde . American hunter-gatherers were spread over

6150-854: The Mali Empire in Africa grew to be the largest empire on the continent, stretching from Senegambia to Ivory Coast . Oceania would see the rise of the Tuʻi Tonga Empire which expanded across many islands in the South Pacific. By the late 15th century, the Aztecs and Inca had become the dominant power in Mesoamerica and the Andes , respectively. The early modern period in Europe and

6273-544: The Middle East , and also independently originated in many other areas including Southeast Asia , parts of Africa , Mesoamerica , and the Andes . Forest gardening was also being used as a food production system in various parts of the world over this period. Many groups continued their hunter-gatherer ways of life, although their numbers have continually declined, partly as a result of pressure from growing agricultural and pastoral communities. Many of them reside in

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6396-587: The Old World over the following millennia. It also occurred independently in Mesoamerica (about 6,000 years ago), China, Papua New Guinea , and the Sahel and West Savanna regions of Africa. Access to food surplus led to the formation of permanent human settlements , the domestication of animals and the use of metal tools for the first time in history. Agriculture and sedentary lifestyle led to

6519-669: The Pit River Tribe , while some Atsugewi people are members of the Susanville Indian Rancheria . Estimates for the pre-contact populations of most native groups in California have varied substantially. Alfred L. Kroeber estimated the combined 1770 population of the Achumawi and Atsugewi as 3,000. A more detailed analysis by Fred B. Kniffen arrived at the same figure. T. R. Garth (1978:237) estimated

6642-652: The Poverty Point culture , Minoans and the Shang dynasty , rose to prominence in new areas. The Late Bronze Age collapse around 1200 BCE resulted in the disappearance of a number of civilizations and the beginning of the Greek Dark Ages . During this period iron started replacing bronze, leading to the Iron Age . In the 5th century BCE, history started being recorded as a discipline , which provided

6765-514: The Southwest , Arctic , Poverty Point , Dalton and Plano traditions. These regional adaptations would become the norm, with reliance less on hunting and gathering, with a more mixed economy of small game, fish , seasonally wild vegetables and harvested plant foods. Scholars like Kat Anderson have suggested that the term Hunter-gatherer is reductive because it implies that Native Americans never stayed in one place long enough to affect

6888-740: The colonization of the Americas and the Columbian Exchange . This expansion led to the Atlantic slave trade and the genocide of Native American peoples . This period also marked the Scientific Revolution , with great advances in mathematics , mechanics , astronomy and physiology . The late modern period (1800–present) saw the Technological and Industrial Revolution bring such discoveries as imaging technology , major innovations in transport and energy development . Influenced by Enlightenment ideals,

7011-552: The 1800s to the present day found that women hunted in 79 percent of hunter gatherer societies. However, an attempted verification of this study found "that multiple methodological failures all bias their results in the same direction...their analysis does not contradict the wide body of empirical evidence for gendered divisions of labor in foraging societies". At the 1966 " Man the Hunter " conference, anthropologists Richard Borshay Lee and Irven DeVore suggested that egalitarianism

7134-818: The Americas began when Paleolithic hunter-gatherers entered North America from the North Asian mammoth steppe via the Beringia land bridge. During the 1970s, Lewis Binford suggested that early humans obtained food via scavenging , not hunting . Early humans in the Lower Paleolithic lived in forests and woodlands , which allowed them to collect seafood, eggs, nuts, and fruits besides scavenging. Rather than killing large animals for meat, according to this view, they used carcasses of such animals that had either been killed by predators or that had died of natural causes. Scientists have demonstrated that

7257-401: The Americas saw a changing environment featuring a warmer more arid climate and the disappearance of the last megafauna. The majority of population groups at this time were still highly mobile hunter-gatherers. Individual groups started to focus on resources available to them locally, however, and thus archaeologists have identified a pattern of increasing regional generalization, as seen with

7380-518: The Americas and Europe experienced a period of political revolutions known as the Age of Revolution . The Napoleonic Wars raged through Europe in the early 1800s, Spain lost most of its colonies in the New World , while Europeans continued expansion into Africa  – where European control went from 10% to almost 90% in less than 50 years  – and Oceania. In the 19th century,

7503-479: The Americas for the first time, coincident with the extinction of numerous predominantly megafaunal species. Major extinctions were incurred in Australia beginning approximately 50,000 years ago and in the Americas about 15,000 years ago. Ancient North Eurasians lived in extreme conditions of the mammoth steppes of Siberia and survived by hunting mammoths , bison and woolly rhinoceroses. The settlement of

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7626-789: The Atsugewi population at a maximum of 850. Kroeber estimated the combined population of the Achumawi and Atsugewi in 1910 as 1,100. The population was given as about 500 in 1936. Hunter gatherer A hunter-gatherer or forager is a human living in a community, or according to an ancestrally derived lifestyle , in which most or all food is obtained by foraging , that is, by gathering food from local naturally occurring sources, especially wild edible plants but also insects , fungi , honey , bird eggs , or anything safe to eat, and/or by hunting game (pursuing and/or trapping and killing wild animals , including catching fish ). This

7749-876: The Mediterranean. In West Asia, the Achaemenid Empire 's system of centralized governance became the precursor to many later empires, while the Gupta Empire in India and the Han dynasty in China have been described as golden ages in their respective regions. Following the fall of the Western Roman Empire in 476, Europe entered the Middle Ages . During this period, Christianity and

7872-832: The Near East ( c.  1450 –1800) began with the final defeat of the Byzantine Empire , and the rise of the Ottoman Empire . Meanwhile, Japan entered the Edo period , the Qing dynasty rose in China and the Mughal Empire ruled much of India. Europe underwent the Renaissance , starting in the 15th century, and the Age of Discovery began with the exploring and colonizing of new regions. This included

7995-587: The Northerners. Leslie Spier concluded that the Klamath and their Modoc relatives gained horses in the 1820s. Atsugewi settlements were likely attacked primarily by Modoc. Outsahone was applied to both the Klamath and Modoc peoples. Captured people would be sold into slavery at an intertribal slave market at The Dalles in present-day Oregon. Atsugewi manufactured bows were prized by the neighboring Klamath , Paiute , Modoc and Achomawi . Called dumidiyi,

8118-670: The Northwest Coast of North America and the Calusa in Florida ) are an exception to this rule. For example, the San people or "Bushmen" of southern Africa have social customs that strongly discourage hoarding and displays of authority, and encourage economic equality via sharing of food and material goods. Karl Marx defined this socio-economic system as primitive communism . The egalitarianism typical of human hunters and gatherers

8241-881: The Pacific Northwest Coast and the Yokuts , lived in particularly rich environments that allowed them to be sedentary or semi-sedentary. Amongst the earliest example of permanent settlements is the Osipovka culture (14–10.3 thousand years ago), which lived in a fish-rich environment that allowed them to be able to stay at the same place all year. One group, the Chumash , had the highest recorded population density of any known hunter and gatherer society with an estimated 21.6 persons per square mile. Hunter-gatherers tend to have an egalitarian social ethos, although settled hunter-gatherers (for example, those inhabiting

8364-412: The age of 15. Of those that reach 15 years of age, 64% continue to live to or past the age of 45. This places the life expectancy between 21 and 37 years. They further estimate that 70% of deaths are due to diseases of some kind, 20% of deaths come from violence or accidents and 10% are due to degenerative diseases. Mutual exchange and sharing of resources (i.e., meat gained from hunting) are important in

8487-477: The arguments put forward by Wilmsen. Doron Shultziner and others have argued that we can learn a lot about the life-styles of prehistoric hunter-gatherers from studies of contemporary hunter-gatherers—especially their impressive levels of egalitarianism. There are nevertheless a number of contemporary hunter-gatherer peoples who, after contact with other societies, continue their ways of life with very little external influence or with modifications that perpetuate

8610-478: The available food, improving aesthetics , increasing knowledge or enhancing the exchange of resources. Humans are one of the most adaptable species, despite having a low or narrow tolerance for many of the earth's extreme environments. Currently the species is present in all eight biogeographical realms , although their presence in the Antarctic realm is very limited to research stations and annually there

8733-561: The best long-distance runners in the animal kingdom, but slower over short distances. Humans' thinner body hair and more productive sweat glands help avoid heat exhaustion while running for long distances. Compared to other apes, the human heart produces greater stroke volume and cardiac output and the aorta is proportionately larger. Like most animals, humans are a diploid and eukaryotic species. Each somatic cell has two sets of 23 chromosomes , each set received from one parent; gametes have only one set of chromosomes, which

8856-766: The bows were of a similar design to those made by the Yurok . The best dumidiyi were made of yew wood by the Atsuge. As fairly peaceable relations developed with Paiute groups by 1870, these yew bows became a common trade item. The visiting Paiute would bring stockpiles of buckskins , red ochre , glass beads, guns, and especially shell currency created from Olivella biplicata shells in central and southern California. In return these trading goods were exchanged for Atsugewi basket and bow goods. The Tolowa , Shasta , Yurok, Klamath, Atsugewi and groups of Western Mono and Paiute were among those known to have adopted buckskin clothing from

8979-665: The collapse of most global empires, leading to widespread decolonization. Following the conclusion of the Second World War in 1945, the United States and the USSR emerged as the remaining global superpowers . This led to a Cold War that saw a struggle for global influence, including a nuclear arms race and a space race , ending in the collapse of the Soviet Union. The current Information Age , spurred by

9102-787: The combined eastern and western Roman Empire in the 4th century AD. Bubonic plagues , first recorded in the 6th century AD, reduced the population by 50%, with the Black Death killing 75–200 million people in Eurasia and North Africa alone. Human population is believed to have reached one billion in 1800. It has since then increased exponentially, reaching two billion in 1930 and three billion in 1960, four in 1975, five in 1987 and six billion in 1999. It passed seven billion in 2011 and passed eight billion in November 2022. It took over two million years of human prehistory and history for

9225-478: The continent, gradually replacing or interbreeding with local populations of archaic humans. Humans began exhibiting behavioral modernity about 160,000–70,000 years ago, and possibly earlier. This development was likely selected amidst natural climate change in Middle to Late Pleistocene Africa. The "out of Africa" migration took place in at least two waves, the first around 130,000 to 100,000 years ago,

9348-400: The country of Denmark in 2007. In addition, wealth transmission across generations was also a feature of hunter-gatherers, meaning that "wealthy" hunter-gatherers, within the context of their communities, were more likely to have children as wealthy as them than poorer members of their community and indeed hunter-gatherer societies demonstrate an understanding of social stratification. Thus while

9471-423: The desire to understand and influence phenomena having motivated humanity's development of science , technology , philosophy , mythology , religion , and other frameworks of knowledge ; humans also study themselves through such domains as anthropology , social science , history , psychology , and medicine . There are estimated to be more than eight billion living humans . Although some scientists equate

9594-532: The developing world, either in arid regions or tropical forests. Areas that were formerly available to hunter-gatherers were—and continue to be—encroached upon by the settlements of agriculturalists. In the resulting competition for land use, hunter-gatherer societies either adopted these practices or moved to other areas. In addition, Jared Diamond has blamed a decline in the availability of wild foods, particularly animal resources. In North and South America , for example, most large mammal species had gone extinct by

9717-516: The development of the Internet and Artificial Intelligence systems, sees the world becoming increasingly globalized and interconnected. Early human settlements were dependent on proximity to water and – depending on the lifestyle – other natural resources used for subsistence , such as populations of animal prey for hunting and arable land for growing crops and grazing livestock. Modern humans, however, have

9840-568: The diet until relatively recently, during the Late Stone Age in southern Africa and the Upper Paleolithic in Europe. Fat is important in assessing the quality of game among hunter-gatherers, to the point that lean animals are often considered secondary resources or even starvation food. Consuming too much lean meat leads to adverse health effects like protein poisoning , and can in extreme cases lead to death. Additionally,

9963-474: The distant Plains Indians . For the Astugewi, this relatively new clothing was called dwákawi. They did not employ a system of consistently smoking the fresh skins. Only buckskins for formal occasions were smoked, leaving daily worn buckskins prone to water damage. The Astugewi potentially did not recognise the water resistance given by the smoking process. Garth conjectured that treating the buckskins with smoke

10086-640: The early 20th century, there has been continuous human presence in Antarctica through research stations and, since 2000, in space through habitation on the International Space Station . All modern humans are classified into the species Homo sapiens , coined by Carl Linnaeus in his 1735 work Systema Naturae . The generic name " Homo " is a learned 18th-century derivation from Latin homō , which refers to humans of either sex. The word human can refer to all members of

10209-409: The economic systems of hunter-gatherer societies. Therefore, these societies can be described as based on a " gift economy ". A 2010 paper argued that while hunter-gatherers may have lower levels of inequality than modern, industrialised societies, that does not mean inequality does not exist. The researchers estimated that the average Gini coefficient amongst hunter-gatherers was 0.25, equivalent to

10332-685: The emergence of early civilizations . An urban revolution took place in the 4th millennium BCE with the development of city-states , particularly Sumerian cities located in Mesopotamia . It was in these cities that the earliest known form of writing, cuneiform script , appeared around 3000 BCE. Other major civilizations to develop around this time were Ancient Egypt and the Indus Valley Civilisation . They eventually traded with each other and invented technology such as wheels, plows and sails. Emerging by 3000 BCE,

10455-553: The end of the Pleistocene —according to Diamond, because of overexploitation by humans, one of several explanations offered for the Quaternary extinction event there. As the number and size of agricultural societies increased, they expanded into lands traditionally used by hunter-gatherers. This process of agriculture-driven expansion led to the development of the first forms of government in agricultural centers, such as

10578-466: The environment around them. However, many of the landscapes in the Americas today are due to the way the Natives of that area originally tended the land. Anderson specifically looks at California Natives and the practices they utilized to tame their land. Some of these practices included pruning, weeding, sowing, burning, and selective harvesting. These practices allowed them to take from the environment in

10701-399: The evidence for early human behaviors for hunting versus carcass scavenging vary based on the ecology, including the types of predators that existed and the environment. According to the endurance running hypothesis , long-distance running as in persistence hunting , a method still practiced by some hunter-gatherer groups in modern times, was likely the driving evolutionary force leading to

10824-408: The evolution of certain human characteristics. This hypothesis does not necessarily contradict the scavenging hypothesis: both subsistence strategies may have been in use sequentially, alternately or even simultaneously. Starting at the transition between the Middle to Upper Paleolithic period, some 80,000 to 70,000 years ago, some hunter-gatherer bands began to specialize, concentrating on hunting

10947-613: The evolutionary emergence of human consciousness , language , kinship and social organization . Most anthropologists believe that hunter-gatherers do not have permanent leaders; instead, the person taking the initiative at any one time depends on the task being performed. Within a particular tribe or people, hunter-gatherers are connected by both kinship and band (residence/domestic group) membership. Postmarital residence among hunter-gatherers tends to be matrilocal, at least initially. Young mothers can enjoy childcare support from their own mothers, who continue living nearby in

11070-566: The genomes of 1,184 individuals from 11 populations and identified 1.6 million single nucleotide polymorphisms . African populations harbor the highest number of private genetic variants. While many of the common variants found in populations outside of Africa are also found on the African continent, there are still large numbers that are private to these regions, especially Oceania and the Americas . By 2010 estimates, humans have approximately 22,000 genes. By comparing mitochondrial DNA , which

11193-595: The global average life expectancy at birth of a girl is estimated to be 74.9 years compared to 70.4 for a boy. There are significant geographical variations in human life expectancy, mostly correlated with economic development – for example, life expectancy at birth in Hong Kong is 87.6 years for girls and 81.8 for boys, while in the Central African Republic , it is 55.0 years for girls and 50.6 for boys. The developed world

11316-443: The human lifestyle. Genes and the environment influence human biological variation in visible characteristics, physiology , disease susceptibility, mental abilities, body size, and life span. Though humans vary in many traits, humans are among the least genetically diverse species. Any two humans are at least 99.5% genetically similar. Humans are sexually dimorphic : generally, males have greater body strength and females have

11439-555: The human population to reach one billion and only 207 years more to grow to 7 billion. The combined biomass of the carbon of all the humans on Earth in 2018 was estimated at 60 million tons, about 10 times larger than that of all non-domesticated mammals. In 2018, 4.2 billion humans (55%) lived in urban areas, up from 751 million in 1950. The most urbanized regions are Northern America (82%), Latin America (81%), Europe (74%) and Oceania (68%), with Africa and Asia having nearly 90% of

11562-517: The human population was reduced to a small number of breeding pairs. The forces of natural selection have continued to operate on human populations, with evidence that certain regions of the genome display directional selection in the past 15,000 years. The human genome was first sequenced in 2001 and by 2020 hundreds of thousands of genomes had been sequenced. In 2012 the International HapMap Project had compared

11685-400: The idea that they were satisfied with very little in the material sense. Later, in 1996, Ross Sackett performed two distinct meta-analyses to empirically test Sahlin's view. The first of these studies looked at 102 time-allocation studies, and the second one analyzed 207 energy-expenditure studies. Sackett found that adults in foraging and horticultural societies work on average, about 6.5 hours

11808-655: The last 10,000 years. Nowadays, some scholars speak about the existence within cultural evolution of the so-called mixed-economies or dual economies which imply a combination of food procurement (gathering and hunting) and food production or when foragers have trade relations with farmers. Some of the theorists who advocate this "revisionist" critique imply that, because the "pure hunter-gatherer" disappeared not long after colonial (or even agricultural) contact began, nothing meaningful can be learned about prehistoric hunter-gatherers from studies of modern ones (Kelly, 24–29; see Wilmsen ) Lee and Guenther have rejected most of

11931-567: The late Miocene epoch. During this split, chromosome 2 was formed from the joining of two other chromosomes, leaving humans with only 23 pairs of chromosomes, compared to 24 for the other apes. Following their split with chimpanzees and bonobos, the hominins diversified into many species and at least two distinct genera. All but one of these lineages – representing the genus Homo and its sole extant species Homo sapiens  – are now extinct. The genus Homo evolved from Australopithecus . Though fossils from

12054-571: The middle-late Bronze Age and Iron Age societies were able to fully replace hunter-gatherers in their final stronghold located in the most densely forested areas. Unlike their Bronze and Iron Age counterparts, Neolithic societies could not establish themselves in dense forests, and Copper Age societies had only limited success. In addition to men, a single study found that women engage in hunting in 79% of modern hunter-gatherer societies. However, an attempted verification of this study found "that multiple methodological failures all bias their results in

12177-549: The more common Apwaruge, named after the valley itself. Exchanges of gifts and commercial trades were very common between the two bands. Relations with the nearby Achomawi settlements were varied for both Atsugewi bands. For example interactions between the territoriality adjacent band of Achomawi, the Illmawi, and the Atsuge were generally terse. These bad feelings arose in part from particular Atsuge trespassing upon Illmawi territory while traveling through to collect obsidian from

12300-501: The most common and widespread species of primate , and the last surviving species of the genus Homo . They are great apes characterized by their hairlessness , bipedalism , and high intelligence . Humans have large brains , enabling more advanced cognitive skills that enable them to thrive and adapt in varied environments, develop highly complex tools , and form complex social structures and civilizations . Humans are highly social , with individual humans tending to belong to

12423-524: The natural world, occupying at least 90 percent of human history . Following the invention of agriculture , hunter-gatherers who did not change were displaced or conquered by farming or pastoralist groups in most parts of the world. Across Western Eurasia, it was not until approximately 4,000 BC that farming and metallurgical societies completely replaced hunter-gatherers. These technologically advanced societies expanded faster in areas with less forest, pushing hunter-gatherers into denser woodlands. Only

12546-602: The nearby Glass Mountain. In general however the Achomawi-speaking peoples were the principal trading destination for most Atsugewi manufactured goods and foodstuffs. Contact between the Achomawi and Atsugewi speakers with the Klamath and Modoc to the north was largely undocumented. Despite this, Garth found it probable that there were extensive interactions between the cultures prior to the adoption of horses by

12669-559: The ongoing mass extinction of other forms of life. Within the last century, humans have explored challenging environments such as Antarctica , the deep sea , and outer space . Human habitation within these hostile environments is restrictive and expensive, typically limited in duration, and restricted to scientific , military , or industrial expeditions. Humans have visited the Moon and made their presence known on other celestial bodies through human-made robotic spacecraft . Since

12792-442: The only primates to have short, relatively flush canine teeth . Humans have characteristically crowded teeth, with gaps from lost teeth usually closing up quickly in young individuals. Humans are gradually losing their third molars , with some individuals having them congenitally absent. Humans share with chimpanzees a vestigial tail, appendix , flexible shoulder joints, grasping fingers and opposable thumbs . Humans also have

12915-423: The only statistically significant factor to impact hunter-gatherer tool kits. Using temperature as a proxy for risk, Collard et al.'s results suggest that environments with extreme temperatures pose a threat to hunter-gatherer systems significant enough to warrant increased variability of tools. These results support Torrence's (1989) theory that the risk of failure is indeed the most important factor in determining

13038-474: The palm of the hand and on the soles of the feet. It is estimated that the worldwide average height for an adult human male is about 171 cm (5 ft 7 in), while the worldwide average height for adult human females is about 159 cm (5 ft 3 in). Shrinkage of stature may begin in middle age in some individuals but tends to be typical in the extremely aged . Throughout history, human populations have universally become taller, probably as

13161-515: The population density varies from one region to another, and large stretches of surface are almost completely uninhabited, like Antarctica and vast swathes of the ocean. Most humans (61%) live in Asia; the remainder live in the Americas (14%), Africa (14%), Europe (11%), and Oceania (0.5%). Estimates of the population at the time agriculture emerged in around 10,000 BC have ranged between 1 million and 15 million. Around 50–60 million people lived in

13284-674: The researchers agreed that hunter-gatherers were more egalitarian than modern societies, prior characterisations of them living in a state of egalitarian primitive communism were inaccurate and misleading. This study, however, exclusively examined modern hunter-gatherer communities, offering limited insight into the exact nature of social structures that existed prior to the Neolithic Revolution. Alain Testart and others have said that anthropologists should be careful when using research on current hunter-gatherer societies to determine

13407-452: The same camp. The systems of kinship and descent among human hunter-gatherers were relatively flexible, although there is evidence that early human kinship in general tended to be matrilineal . The conventional assumption has been that women did most of the gathering, while men concentrated on big game hunting. An illustrative account is Megan Biesele's study of the southern African Ju/'hoan, 'Women Like Meat'. A recent study suggests that

13530-646: The same direction...their analysis does not contradict the wide body of empirical evidence for gendered divisions of labor in foraging societies". Only a few contemporary societies of uncontacted people are still classified as hunter-gatherers, and many supplement their foraging activity with horticulture or pastoralism . Hunting and gathering was presumably the subsistence strategy employed by human societies beginning some 1.8 million years ago, by Homo erectus , and from its appearance some 200,000 years ago by Homo sapiens . Prehistoric hunter-gatherers lived in groups that consisted of several families resulting in

13653-404: The second ( Southern Dispersal ) around 70,000 to 50,000 years ago. H. sapiens proceeded to colonize all the continents and larger islands, arriving in Eurasia 125,000 years ago, Australia around 65,000 years ago, the Americas around 15,000 years ago, and remote islands such as Hawaii , Easter Island , Madagascar , and New Zealand in the years 300 to 1280 CE. Human evolution was not

13776-547: The sense of humanity). The native English term man can refer to the species generally (a synonym for humanity ) as well as to human males. It may also refer to individuals of either sex. Despite the fact that the word animal is colloquially used as an antonym for human , and contrary to a common biological misconception , humans are animals . The word person is often used interchangeably with human , but philosophical debate exists as to whether personhood applies to all humans or all sentient beings , and further if

13899-509: The sexual division of labor was the fundamental organizational innovation that gave Homo sapiens the edge over the Neanderthals, allowing our ancestors to migrate from Africa and spread across the globe. A 1986 study found most hunter-gatherers have a symbolically structured sexual division of labor. However, it is true that in a small minority of cases, women hunted the same kind of quarry as men, sometimes doing so alongside men. Among

14022-403: The structure of hunter-gatherer toolkits. One way to divide hunter-gatherer groups is by their return systems. James Woodburn uses the categories "immediate return" hunter-gatherers for egalitarianism and "delayed return" for nonegalitarian. Immediate return foragers consume their food within a day or two after they procure it. Delayed return foragers store the surplus food. Hunting-gathering

14145-765: The structure of societies in the paleolithic era, emphasising cross-cultural influences, progress and development that such societies have undergone in the past 10,000 years. As one moves away from the equator , the importance of plant food decreases and the importance of aquatic food increases. In cold and heavily forested environments, edible plant foods and large game are less abundant and hunter-gatherers may turn to aquatic resources to compensate. Hunter-gatherers in cold climates also rely more on stored food than those in warm climates. However, aquatic resources tend to be costly, requiring boats and fishing technology, and this may have impeded their intensive use in prehistory. Marine food probably did not start becoming prominent in

14268-433: The term "humans" with all members of the genus Homo , in common usage it generally refers to Homo sapiens , the only extant member. All other members of the genus Homo , which are now extinct, are known as archaic humans , and the term "modern human" is used to distinguish Homo sapiens from archaic humans. Anatomically modern humans emerged around 300,000 years ago in Africa, evolving from Homo heidelbergensis or

14391-427: The transition are scarce, the earliest members of Homo share several key traits with Australopithecus . The earliest record of Homo is the 2.8 million-year-old specimen LD 350-1 from Ethiopia , and the earliest named species are Homo habilis and Homo rudolfensis which evolved by 2.3 million years ago. H. erectus (the African variant is sometimes called H. ergaster ) evolved 2 million years ago and

14514-847: The viability of hunting and gathering in the 21st century. One such group is the Pila Nguru (Spinifex people) of Western Australia , whose land in the Great Victoria Desert has proved unsuitable for European agriculture (and even pastoralism). Another are the Sentinelese of the Andaman Islands in the Indian Ocean , who live on North Sentinel Island and to date have maintained their independent existence, repelling attempts to engage with and contact them. The Savanna Pumé of Venezuela also live in an area that

14637-440: The world's 3.4 billion rural population. Problems for humans living in cities include various forms of pollution and crime , especially in inner city and suburban slums . Most aspects of human physiology are closely homologous to corresponding aspects of animal physiology. The dental formula of humans is: 2.1.2.3 2.1.2.3 . Humans have proportionately shorter palates and much smaller teeth than other primates. They are

14760-446: Was a recent development, having "a close connection with the introduction of buckskin clothing itself" but lacked direct evidence of this trend. A full list of Atsugewi plants can be found at http://naeb.brit.org/uses/tribes/19/ (68 documented uses). The Atsugewi language is a Palaihnihan language. As of 1994, an estimated three people spoke Atsugewi. The majority of the tribe speaks English . Today many Atsugewi are enrolled in

14883-429: Was one of several central characteristics of nomadic hunting and gathering societies because mobility requires minimization of material possessions throughout a population. Therefore, no surplus of resources can be accumulated by any single member. Other characteristics Lee and DeVore proposed were flux in territorial boundaries as well as in demographic composition. At the same conference, Marshall Sahlins presented

15006-465: Was the common human mode of subsistence throughout the Paleolithic , but the observation of current-day hunters and gatherers does not necessarily reflect Paleolithic societies; the hunter-gatherer cultures examined today have had much contact with modern civilization and do not represent "pristine" conditions found in uncontacted peoples . The transition from hunting and gathering to agriculture

15129-402: Was the first archaic human species to leave Africa and disperse across Eurasia. H. erectus also was the first to evolve a characteristically human body plan . Homo sapiens emerged in Africa around 300,000 years ago from a species commonly designated as either H. heidelbergensis or H. rhodesiensis , the descendants of H. erectus that remained in Africa. H. sapiens migrated out of

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