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144-458: There are scholars who question the existence of a Christian philosophy itself. These claim that there is no originality in Christian thought and its concepts and ideas are inherited from Greek philosophy . Thus, Christian philosophy would protect philosophical thought, which would already be definitively elaborated by Greek philosophy. However, Boehner and Gilson claim that Christian philosophy

288-425: A linguistic therapy. According to Ludwig Wittgenstein , for instance, philosophy aims at dispelling misunderstandings to which humans are susceptible due to the confusing structure of ordinary language . Phenomenologists , such as Edmund Husserl , characterize philosophy as a "rigorous science" investigating essences . They practice a radical suspension of theoretical assumptions about reality to get back to

432-478: A religion , and had great impact on Gnosticism and Christian theology . Philosophy Philosophy ('love of wisdom' in Ancient Greek ) is a systematic study of general and fundamental questions concerning topics like existence , reason , knowledge , value , mind , and language . It is a rational and critical inquiry that reflects on its own methods and assumptions. Historically, many of

576-454: A certain sense common, but, as a general rule, private; for, when everyone has a distinct interest, men will not complain of one another, and they will make more progress because everyone will be attending to his own business... And further, there is the greatest pleasure in doing a kindness or service to friends or guests or companions, which can only be rendered when a man has private property. These advantages are lost by excessive unification of

720-518: A city is likely impossible, however, generally assuming that philosophers would refuse to rule and the people would refuse to compel them to do so. Whereas the Republic is premised on a distinction between the sort of knowledge possessed by the philosopher and that possessed by the king or political man, Socrates explores only the character of the philosopher; in the Statesman , on the other hand,

864-545: A doctor diagnoses a disease based on the observed symptoms. Logic also investigates incorrect forms of reasoning. They are called fallacies and are divided into formal and informal fallacies based on whether the source of the error lies only in the form of the argument or also in its content and context. Metaphysics is the study of the most general features of reality , such as existence, objects and their properties , wholes and their parts , space and time , events , and causation . There are disagreements about

1008-570: A firm conclusion, or aporetically , has stimulated debate over the meaning of the Socratic method . Socrates is said to have pursued this probing question-and-answer style of examination on a number of topics, usually attempting to arrive at a defensible and attractive definition of a virtue . While Socrates' recorded conversations rarely provide a definite answer to the question under examination, several maxims or paradoxes for which he has become known recur. Socrates taught that no one desires what

1152-444: A great variety of methods to arrive at philosophical knowledge. They include conceptual analysis , reliance on common sense and intuitions , use of thought experiments , analysis of ordinary language , description of experience , and critical questioning . Philosophy is related to many other fields, including the sciences, mathematics , business , law , and journalism . It provides an interdisciplinary perspective and studies

1296-491: A hot thing cold). Therefore, they cannot truly be opposites but rather must both be manifestations of some underlying unity that is neither. This underlying unity (substratum, arche ) could not be any of the classical elements, since they were one extreme or another. For example, water is wet, the opposite of dry, while fire is dry, the opposite of wet. This initial state is ageless and imperishable, and everything returns to it according to necessity. Anaximenes in turn held that

1440-533: A main objective the defense of Christianity. As Christianity spread, patristic authors increasingly engaged with the philosophical schools of the hellenized Roman Empire, and ultimately learned from some aspects of these surrounding ideas how to better articulate Christianity's own revelation of Jesus Christ as God incarnate and one with God the Father and God the Spirit. Many scholars consider Origen of Alexandria to be

1584-702: A metaphysical foundation of ethics. The modern period in Chinese philosophy began in the early 20th century and was shaped by the influence of and reactions to Western philosophy. The emergence of Chinese Marxism —which focused on class struggle , socialism , and communism —resulted in a significant transformation of the political landscape. Another development was the emergence of New Confucianism , which aims to modernize and rethink Confucian teachings to explore their compatibility with democratic ideals and modern science. Traditional Japanese philosophy assimilated and synthesized ideas from different traditions, including

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1728-468: A noticeable growth in the number of female philosophers , but they still remained underrepresented. Arabic–Persian philosophy arose in the early 9th century CE as a response to discussions in the Islamic theological tradition . Its classical period lasted until the 12th century CE and was strongly influenced by ancient Greek philosophers. It employed their ideas to elaborate and interpret the teachings of

1872-460: A part of intellectual history , but it also investigates questions not covered by intellectual history such as whether the theories of past philosophers are true and have remained philosophically relevant. The history of philosophy is primarily concerned with theories based on rational inquiry and argumentation; some historians understand it in a looser sense that includes myths , religious teachings , and proverbial lore. Influential traditions in

2016-466: A participant referred to as the Eleatic Stranger discusses the sort of knowledge possessed by the political man, while Socrates listens quietly. Although rule by a wise man would be preferable to rule by law, the wise cannot help but be judged by the unwise, and so in practice, rule by law is deemed necessary. Both the Republic and the Statesman reveal the limitations of politics, raising

2160-460: A precursor to Epicurus ' total break between science and religion. Pythagoras lived at approximately the same time that Xenophanes did and, in contrast to the latter, the school that he founded sought to reconcile religious belief and reason. Little is known about his life with any reliability, however, and no writings of his survive, so it is possible that he was simply a mystic whose successors introduced rationalism into Pythagoreanism, that he

2304-519: A single good , which was apparently combined with the Eleatic doctrine of Unity . Their work on modal logic , logical conditionals , and propositional logic played an important role in the development of logic in antiquity, and were influences on the subsequent creation of Stoicism and Pyrrhonism . During the Hellenistic and Roman periods, many different schools of thought developed in

2448-499: A transcendental mathematical relation. Heraclitus must have lived after Xenophanes and Pythagoras, as he condemns them along with Homer as proving that much learning cannot teach a man to think; since Parmenides refers to him in the past tense, this would place him in the 5th century BC. Contrary to the Milesian school , which posits one stable element as the arche , Heraclitus taught that panta rhei ("everything flows"),

2592-612: A variety of arguments. Deductive arguments are mainly studied by formal logic. An argument is deductively valid if the truth of its premises ensures the truth of its conclusion. Deductively valid arguments follow a rule of inference , like modus ponens , which has the following logical form : " p ; if p then q ; therefore q ". An example is the argument "today is Sunday; if today is Sunday then I don't have to go to work today; therefore I don't have to go to work today". The premises of non-deductive arguments also support their conclusion, although this support does not guarantee that

2736-512: A wide variety of subjects, including astronomy , epistemology , mathematics , political philosophy , ethics , metaphysics , ontology , logic , biology , rhetoric and aesthetics . Greek philosophy continued throughout the Hellenistic period and later evolved into Roman philosophy . Greek philosophy has influenced much of Western culture since its inception, and can be found in many aspects of public education. Alfred North Whitehead once claimed: "The safest general characterization of

2880-494: Is a combination of different parts and attempts to identify what those parts are. An influential theory in this area claims that knowledge has three components: it is a belief that is justified and true . This theory is controversial and the difficulties associated with it are known as the Gettier problem . Alternative views state that knowledge requires additional components, like the absence of luck; different components, like

3024-510: Is a common issue in relation to the sources of knowledge and the justification they offer. It is based on the idea that beliefs require some kind of reason or evidence to be justified. The problem is that the source of justification may itself be in need of another source of justification. This leads to an infinite regress or circular reasoning . Foundationalists avoid this conclusion by arguing that some sources can provide justification without requiring justification themselves. Another solution

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3168-561: Is a set of essential features shared by all parts of philosophy. Others see only weaker family resemblances or contend that it is merely an empty blanket term. Precise definitions are often only accepted by theorists belonging to a certain philosophical movement and are revisionistic according to Søren Overgaard et al. in that many presumed parts of philosophy would not deserve the title "philosophy" if they were true. Some definitions characterize philosophy in relation to its method, like pure reasoning. Others focus on its topic, for example, as

3312-582: Is a story that Protagoras , too, was forced to flee and that the Athenians burned his books. Socrates, however, is the only subject recorded as charged under this law, convicted, and sentenced to death in 399 BC (see Trial of Socrates ). In the version of his defense speech presented by Plato, he claims that it is the envy he arouses on account of his being a philosopher that will convict him. Numerous subsequent philosophical movements were inspired by Socrates or his younger associates. Plato casts Socrates as

3456-467: Is also concerned with the moral evaluation of character traits and institutions. It explores what the standards of morality are and how to live a good life. Philosophical ethics addresses such basic questions as "Are moral obligations relative?"; "Which has priority: well-being or obligation?"; and "What gives life meaning?" The main branches of ethics are meta-ethics , normative ethics , and applied ethics . Meta-ethics asks abstract questions about

3600-483: Is an expression of the philosopher's love of wisdom and has the aim of improving one's well-being by leading a reflective life. For example, the Stoics saw philosophy as an exercise to train the mind and thereby achieve eudaimonia and flourish in life. As a discipline, the history of philosophy aims to provide a systematic and chronological exposition of philosophical concepts and doctrines. Some theorists see it as

3744-666: Is and how to acquire it. Ethics investigates moral principles and what constitutes right conduct. Logic is the study of correct reasoning and explores how good arguments can be distinguished from bad ones. Metaphysics examines the most general features of reality , existence, objects , and properties . Other subfields are aesthetics , philosophy of language , philosophy of mind , philosophy of religion , philosophy of science , philosophy of mathematics , philosophy of history , and political philosophy . Within each branch, there are competing schools of philosophy that promote different principles, theories, or methods. Philosophers use

3888-538: Is bad, and so if anyone does something that truly is bad, it must be unwillingly or out of ignorance; consequently, all virtue is knowledge. He frequently remarks on his own ignorance (claiming that he does not know what courage is, for example). Plato presents him as distinguishing himself from the common run of mankind by the fact that, while they know nothing noble and good, they do not know that they do not know, whereas Socrates knows and acknowledges that he knows nothing noble and good. The great statesman Pericles

4032-451: Is closely related to the disciplines of logic and linguistics. The philosophy of language rose to particular prominence in the early 20th century in analytic philosophy due to the works of Frege and Russell. One of its central topics is to understand how sentences get their meaning. There are two broad theoretical camps: those emphasizing the formal truth conditions of sentences and those investigating circumstances that determine when it

4176-408: Is concerned with meaning , understanding , or the clarification of language. According to one view, philosophy is conceptual analysis , which involves finding the necessary and sufficient conditions for the application of concepts. Another definition characterizes philosophy as thinking about thinking to emphasize its self-critical, reflective nature. A further approach presents philosophy as

4320-577: Is derived from the Republic , the Laws , and the Statesman . The first of these contains the suggestion that there will not be justice in cities unless they are ruled by philosopher kings ; those responsible for enforcing the laws are compelled to hold their women, children, and property in common ; and the individual is taught to pursue the common good through noble lies ; the Republic says that such

4464-460: Is itself a borrowing from the Latin philosophia . The term philosophy acquired the meanings of "advanced study of the speculative subjects ( logic , ethics , physics , and metaphysics )", "deep wisdom consisting of love of truth and virtuous living", "profound learning as transmitted by the ancient writers", and "the study of the fundamental nature of knowledge , reality , and existence , and

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4608-409: Is no coming into being or passing away, genesis or decay, they said that things appear to come into being and pass away because the elements out of which they are composed assemble or disassemble while themselves being unchanging. Leucippus also proposed an ontological pluralism with a cosmogony based on two main elements: the vacuum and atoms. These, by means of their inherent movement, are crossing

4752-462: Is not a simple repetition of ancient philosophy, although they owe to Greek science the knowledge developed by Plato , Aristotle and the Neo-Platonists . They even claim that in Christian philosophy, Greek culture survives in organic form. Christian philosophy began around the 3rd century. It arises through the movement of the Christian community called Patristics , which initially had as

4896-523: Is not always easy to distinguish between the two. While the Socrates presented in the dialogues is often taken to be Plato's mouthpiece, Socrates' reputation for irony , his caginess regarding his own opinions in the dialogues, and his occasional absence from or minor role in the conversation serve to conceal Plato's doctrines. Much of what is said about his doctrines is derived from what Aristotle reports about them. The political doctrine ascribed to Plato

5040-475: Is presented by coherentists , who state that a belief is justified if it coheres with other beliefs of the person. Many discussions in epistemology touch on the topic of philosophical skepticism , which raises doubts about some or all claims to knowledge. These doubts are often based on the idea that knowledge requires absolute certainty and that humans are unable to acquire it. Ethics, also known as moral philosophy, studies what constitutes right conduct . It

5184-418: Is sometimes understood as a proper science in its own right. According to some naturalistic philosophers , such as W. V. O. Quine , philosophy is an empirical yet abstract science that is concerned with wide-ranging empirical patterns instead of particular observations. Science-based definitions usually face the problem of explaining why philosophy in its long history has not progressed to the same extent or in

5328-439: Is that actions are in tune with those duties and not what consequences they have. Virtue theorists judge actions based on how the moral character of the agent is expressed. According to this view, actions should conform to what an ideally virtuous agent would do by manifesting virtues like generosity and honesty . Logic is the study of correct reasoning . It aims to understand how to distinguish good from bad arguments . It

5472-405: Is the arche of everything. Pythagoreanism also incorporated ascetic ideals, emphasizing purgation, metempsychosis , and consequently a respect for all animal life; much was made of the correspondence between mathematics and the cosmos in a musical harmony. Pythagoras believed that behind the appearance of things, there was the permanent principle of mathematics, and that the forms were based on

5616-468: Is the 1687 book Philosophiæ Naturalis Principia Mathematica by Isaac Newton . This book referred to natural philosophy in its title, but it is today considered a book of physics. The meaning of philosophy changed toward the end of the modern period when it acquired the more narrow meaning common today. In this new sense, the term is mainly associated with philosophical disciplines like metaphysics, epistemology, and ethics. Among other topics, it covers

5760-473: Is the relation between reason and revelation . Indian philosophy combines the spiritual problem of how to reach enlightenment with the exploration of the nature of reality and the ways of arriving at knowledge. Chinese philosophy focuses principally on practical issues in relation to right social conduct, government, and self-cultivation . Major branches of philosophy are epistemology , ethics , logic , and metaphysics . Epistemology studies what knowledge

5904-462: Is truth established?"; and "Can we prove causal relations?" Epistemology is primarily interested in declarative knowledge or knowledge of facts, like knowing that Princess Diana died in 1997. But it also investigates practical knowledge , such as knowing how to ride a bicycle, and knowledge by acquaintance , for example, knowing a celebrity personally. One area in epistemology is the analysis of knowledge . It assumes that declarative knowledge

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6048-456: Is usually divided into formal and informal logic . Formal logic uses artificial languages with a precise symbolic representation to investigate arguments. In its search for exact criteria, it examines the structure of arguments to determine whether they are correct or incorrect. Informal logic uses non-formal criteria and standards to assess the correctness of arguments. It relies on additional factors such as content and context. Logic examines

6192-556: Is whether beauty is an objective feature of entities or a subjective aspect of experience. Aesthetic philosophers also investigate the nature of aesthetic experiences and judgments . Further topics include the essence of works of art and the processes involved in creating them. The philosophy of language studies the nature and function of language . It examines the concepts of meaning , reference , and truth. It aims to answer questions such as how words are related to things and how language affects human thought and understanding. It

6336-592: The φύσις of all things." Xenophanes was born in Ionia , where the Milesian school was at its most powerful and may have picked up some of the Milesians' cosmological theories as a result. What is known is that he argued that each of the phenomena had a natural rather than divine explanation in a manner reminiscent of Anaximander's theories and that there was only one god, the world as a whole, and that he ridiculed

6480-615: The European philosophical tradition is that it consists of a series of footnotes to Plato". Clear, unbroken lines of influence lead from ancient Greek and Hellenistic philosophers to Roman philosophy , Early Islamic philosophy , Medieval Scholasticism , the European Renaissance and the Age of Enlightenment . Greek philosophy was influenced to some extent by the older wisdom literature and mythological cosmogonies of

6624-569: The Hellenistic world and then the Greco-Roman world. The spread of Christianity throughout the Roman world, followed by the spread of Islam , ushered in the end of Hellenistic philosophy and the beginnings of Medieval philosophy , which was dominated by the three Abrahamic traditions: Jewish philosophy , Christian philosophy , and early Islamic philosophy . Pyrrho of Elis , a Democritean philosopher, traveled to India with Alexander

6768-530: The New Academy , although some ancient authors added further subdivisions, such as a Middle Academy . The Academic skeptics did not doubt the existence of truth ; they just doubted that humans had the capacities for obtaining it. They based this position on Plato's Phaedo , sections 64–67, in which Socrates discusses how knowledge is not accessible to mortals. While the objective of the Pyrrhonists

6912-527: The Quran . Al-Kindi (801–873 CE) is usually regarded as the first philosopher of this tradition. He translated and interpreted many works of Aristotle and Neoplatonists in his attempt to show that there is a harmony between reason and faith . Avicenna (980–1037 CE) also followed this goal and developed a comprehensive philosophical system to provide a rational understanding of reality encompassing science, religion, and mysticism. Al-Ghazali (1058–1111 CE)

7056-591: The absence of pain in the body and trouble in the mind". The founder of Stoicism, Zeno of Citium , was taught by Crates of Thebes, and he took up the Cynic ideals of continence and self-mastery, but applied the concept of apatheia (indifference) to personal circumstances rather than social norms, and switched shameless flouting of the latter for a resolute fulfillment of social duties. Logic and physics were also part of early Stoicism, further developed by Zeno's successors Cleanthes and Chrysippus . Their metaphysics

7200-479: The ancient Near East , though the extent of this influence is widely debated. The classicist Martin Litchfield West states, "contact with oriental cosmology and theology helped to liberate the early Greek philosophers' imagination; it certainly gave them many suggestive ideas. But they taught themselves to reason. Philosophy as we understand it is a Greek creation". Subsequent philosophic tradition

7344-720: The anthropomorphism of the Greek religion by claiming that cattle would claim that the gods looked like cattle, horses like horses, and lions like lions, just as the Ethiopians claimed that the gods were snub-nosed and black and the Thracians claimed they were pale and red-haired. Xenophanes was highly influential to subsequent schools of philosophy. He was seen as the founder of a line of philosophy that culminated in Pyrrhonism , possibly an influence on Eleatic philosophy , and

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7488-455: The arche was air, although John Burnet argues that by this, he meant that it was a transparent mist, the aether . Despite their varied answers, the Milesian school was searching for a natural substance that would remain unchanged despite appearing in different forms, and thus represents one of the first scientific attempts to answer the question that would lead to the development of modern atomic theory; "the Milesians," says Burnet, "asked for

7632-504: The pre-Socratics gained currency with the 1903 publication of Hermann Diels' Fragmente der Vorsokratiker , although the term did not originate with him. The term is considered useful because what came to be known as the "Athenian school" (composed of Socrates, Plato, and Aristotle ) signaled the rise of a new approach to philosophy; Friedrich Nietzsche 's thesis that this shift began with Plato rather than with Socrates (hence his nomenclature of "pre-Platonic philosophy") has not prevented

7776-426: The pyramids . Thales inspired the Milesian school of philosophy and was followed by Anaximander , who argued that the substratum or arche could not be water or any of the classical elements but was instead something "unlimited" or "indefinite" (in Greek, the apeiron ). He began from the observation that the world seems to consist of opposites (e.g., hot and cold), yet a thing can become its opposite (e.g.,

7920-555: The regimes described in Plato's Republic and Laws , and refers to the theory of forms as "empty words and poetic metaphors". He is generally presented as giving greater weight to empirical observation and practical concerns. Aristotle's fame was not great during the Hellenistic period , when Stoic logic was in vogue, but later peripatetic commentators popularized his work, which eventually contributed heavily to Islamic, Jewish, and medieval Christian philosophy. His influence

8064-563: The sage and the fool. Slight as the difference may appear between the positions of the Academic skeptics and the Pyrrhonists, a comparison of their lives leads to the conclusion that a practical philosophical moderation was the characteristic of the Academic skeptics whereas the objectives of the Pyrrhonists were more psychological. Following the end of the skeptical period of the Academy with Antiochus of Ascalon , Platonic thought entered

8208-420: The "things themselves", that is, as originally given in experience. They contend that this base-level of experience provides the foundation for higher-order theoretical knowledge, and that one needs to understand the former to understand the latter. An early approach found in ancient Greek and Roman philosophy is that philosophy is the spiritual practice of developing one's rational capacities. This practice

8352-412: The 5th century CE. Its focus was on religious topics and many thinkers used ancient philosophy to explain and further elaborate Christian doctrines . The Renaissance period started in the 14th century and saw a renewed interest in schools of ancient philosophy, in particular Platonism . Humanism also emerged in this period. The modern period started in the 17th century. One of its central concerns

8496-460: The Great 's army where Pyrrho was influenced by Buddhist teachings, most particularly the three marks of existence . After returning to Greece, Pyrrho started a new school of philosophy, Pyrrhonism , which taught that it is one's opinions about non-evident matters (i.e., dogma ) that prevent one from attaining eudaimonia . Pyrrhonism places the attainment of ataraxia (a state of equanimity ) as

8640-582: The Great , and ultimately returned to Athens a decade later to establish his own school: the Lyceum . At least twenty-nine of his treatises have survived, known as the corpus Aristotelicum , and address a variety of subjects including logic , physics , optics , metaphysics , ethics , rhetoric , politics , poetry , botany, and zoology. Aristotle is often portrayed as disagreeing with his teacher Plato (e.g., in Raphael 's School of Athens ). He criticizes

8784-400: The Milesian school, in suggesting that the substratum could appear in a variety of different guises, implied that everything that exists is corpuscular, Parmenides argued that the first principle of being was One, indivisible, and unchanging. Being, he argued, by definition implies eternality, while only that which is can be thought; a thing which is , moreover, cannot be more or less, and so

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8928-522: The Secular philosopher, the Christian philosopher seeks conditions for the identification of eternal truth, being characterized by religiosity There is criticism of Christian philosophy because the Christian religion is hegemonic at this time and centralizes the elaboration of all values. The coexistence of philosophy and religion is questioned, as philosophy itself is critical and religion founded on revelation and established dogmas. Lara believes that there

9072-442: The basic limits of human understanding". Before the modern age, the term philosophy was used in a wide sense. It included most forms of rational inquiry, such as the individual sciences , as its subdisciplines. For instance, natural philosophy was a major branch of philosophy. This branch of philosophy encompassed a wide range of fields, including disciplines like physics, chemistry , and biology . An example of this usage

9216-441: The beginning of the 20th century. It discusses topics such as ethnophilosophy , négritude , pan-Africanism , Marxism, postcolonialism , the role of cultural identity, relativism , epistemological dualism , and the critique of Eurocentrism . Philosophical questions can be grouped into several branches. These groupings allow philosophers to focus on a set of similar topics and interact with other thinkers who are interested in

9360-581: The choice of "Early Greek Philosophy" over "pre-Socratic philosophy" most notably because Socrates is contemporary and sometimes even prior to philosophers traditionally considered "pre-Socratic" (e.g., the Atomists). The early Greek philosophers (or "pre-Socratics") were primarily concerned with cosmology , ontology , and mathematics. They were distinguished from "non-philosophers" insofar as they rejected mythological explanations in favor of reasoned discourse. Thales of Miletus , regarded by Aristotle as

9504-461: The closest element to this eternal flux being fire. All things come to pass in accordance with Logos , which must be considered as "plan" or "formula", and "the Logos is common". He also posited a unity of opposites , expressed through dialectic , which structured this flux, such as that seeming opposites in fact are manifestations of a common substrate to good and evil itself. Heraclitus called

9648-560: The color red, can exist at different locations at the same time. This is not the case for particulars including individual persons or specific objects. Other metaphysical questions are whether the past fully determines the present and what implications this would have for the existence of free will . There are many other subfields of philosophy besides its core branches. Some of the most prominent are aesthetics, philosophy of language, philosophy of mind, philosophy of religion, philosophy of science, and political philosophy. Aesthetics in

9792-445: The conclusion being that one cannot look to nature for guidance regarding how to live one's life. Protagoras and subsequent sophists tended to teach rhetoric as their primary vocation. Prodicus , Gorgias , Hippias , and Thrasymachus appear in various dialogues , sometimes explicitly teaching that while nature provides no ethical guidance, the guidance that the laws provide is worthless, or that nature favors those who act against

9936-461: The conclusion is true. One form is inductive reasoning . It starts from a set of individual cases and uses generalization to arrive at a universal law governing all cases. An example is the inference that "all ravens are black" based on observations of many individual black ravens. Another form is abductive reasoning . It starts from an observation and concludes that the best explanation of this observation must be true. This happens, for example, when

10080-614: The consequences of the general theories developed by normative ethics in specific situations, for example, in the workplace or for medical treatments. Within contemporary normative ethics, consequentialism, deontology , and virtue ethics are influential schools of thought. Consequentialists judge actions based on their consequences. One such view is utilitarianism , which argues that actions should increase overall happiness while minimizing suffering. Deontologists judge actions based on whether they follow moral duties, such as abstaining from lying or killing. According to them, what matters

10224-607: The difference between the changing, perceptible world and the unchanging, intelligible realm. Platonism stands in opposition to nominalism , which denies the existence of such abstract entities. Around 266 BC, Arcesilaus became head of the Platonic Academy , and adopted skepticism as a central tenet of Platonism , making Platonism nearly the same as Pyrrhonism . After Arcesilaus, Academic skepticism diverged from Pyrrhonism. This skeptical period of ancient Platonism, from Arcesilaus to Philo of Larissa , became known as

10368-400: The emergence and application of formal logic , the focus on the role of language as well as pragmatism , and movements in continental philosophy like phenomenology, existentialism , and post-structuralism . The 20th century saw a rapid expansion of academic philosophy in terms of the number of philosophical publications and philosophers working at academic institutions . There was also

10512-482: The emergence of non-Vedic teachings, like Buddhism and Jainism . Buddhism was founded by Gautama Siddhartha (563–483 BCE), who challenged the Vedic idea of a permanent self and proposed a path to liberate oneself from suffering . Jainism was founded by Mahavira (599–527 BCE), who emphasized non-violence as well as respect toward all forms of life. The subsequent classical period started roughly 200 BCE and

10656-585: The ethics of Cynicism to articulate Stoicism . Epicurus studied with Platonic and Pyrrhonist teachers before renouncing all previous philosophers (including Democritus , on whose atomism the Epicurean philosophy relies). The philosophic movements that were to dominate the intellectual life of the Roman Empire were thus born in this febrile period following Socrates' activity, and either directly or indirectly influenced by him. They were also absorbed by

10800-609: The expanding Muslim world in the 7th through 10th centuries AD, from which they returned to the West as foundations of Medieval philosophy and the Renaissance , as discussed below. Plato was an Athenian of the generation after Socrates . Ancient tradition ascribes thirty-six dialogues and thirteen letters to him, although of these only twenty-four of the dialogues are now universally recognized as authentic; most modern scholars believe that at least twenty-eight dialogues and two of

10944-407: The features that all entities have in common. Specific metaphysics is interested in different kinds of being, the features they have, and how they differ from one another. An important area in metaphysics is ontology . Some theorists identify it with general metaphysics. Ontology investigates concepts like being , becoming , and reality. It studies the categories of being and asks what exists on

11088-441: The first Christian teacher to fully present Christian philosophy and metaphysics as a stronger alternative to other schools (especially Platonism). See Origen Against Plato by Mark J. Edwards and the introduction to Origen: On First Principles translated and introduced by John Behr as two prominent examples of this history of a specifically Christian philosophy and metaphysics. From the 11th century onwards, Christian philosophy

11232-459: The first philosopher, held that all things arise from a single material substance, water. It is not because he gave a cosmogony that John Burnet calls him the "first man of science", but because he gave a naturalistic explanation of the cosmos and supported it with reasons. According to tradition, Thales was able to predict an eclipse and taught the Egyptians how to measure the height of

11376-512: The freedom from fears and desires was happiness itself. Platonism is the philosophy of Plato , asserting the existence of abstract objects , which exist in a realm distinct from both the physical world and the mind. Central to Platonism is the Theory of Forms , where ideal Forms or perfect archetypes are considered the true reality, with the physical world being an imperfect reflection. This philosophy has influenced Western thought , emphasizing

11520-429: The heavens, placed it in cities, introduced it into families, and obliged it to examine into life and morals, and good and evil." By this account he would be considered the founder of political philosophy . The reasons for this turn toward political and ethical subjects remain the object of much study. The fact that many conversations involving Socrates (as recounted by Plato and Xenophon ) end without having reached

11664-539: The history of philosophy include Western , Arabic–Persian , Indian , and Chinese philosophy . Other philosophical traditions are Japanese philosophy , Latin American philosophy , and African philosophy . Western philosophy originated in Ancient Greece in the 6th century BCE with the pre-Socratics . They attempted to provide rational explanations of the cosmos as a whole. The philosophy following them

11808-420: The importance of a strong state and strict laws. Buddhism was introduced to China in the 1st century CE and diversified into new forms of Buddhism . Starting in the 3rd century CE, the school of Xuanxue emerged. It interpreted earlier Daoist works with a specific emphasis on metaphysical explanations. Neo-Confucianism developed in the 11th century CE. It systematized previous Confucian teachings and sought

11952-419: The indigenous Shinto religion and Chinese and Indian thought in the forms of Confucianism and Buddhism, both of which entered Japan in the 6th and 7th centuries. Its practice is characterized by active interaction with reality rather than disengaged examination. Neo-Confucianism became an influential school of thought in the 16th century and the following Edo period and prompted a greater focus on language and

12096-511: The individual sciences , such as physics and psychology , formed part of philosophy. However, they are considered separate academic disciplines in the modern sense of the term. Influential traditions in the history of philosophy include Western , Arabic–Persian , Indian , and Chinese philosophy . Western philosophy originated in Ancient Greece and covers a wide area of philosophical subfields. A central topic in Arabic–Persian philosophy

12240-483: The interconnectedness of all things. Latin American philosophy during the colonial period , starting around 1550, was dominated by religious philosophy in the form of scholasticism . Influential topics in the post-colonial period were positivism , the philosophy of liberation , and the exploration of identity and culture. Early African philosophy, like Ubuntu philosophy , was focused on community, morality, and ancestral ideas. Systematic African philosophy emerged at

12384-466: The laws. Socrates , believed to have been born in Athens in the 5th century BC , marks a watershed in ancient Greek philosophy. Athens was a center of learning, with sophists and philosophers traveling from across Greece to teach rhetoric, astronomy, cosmology, and geometry. While philosophy was an established pursuit prior to Socrates, Cicero credits him as "the first who brought philosophy down from

12528-471: The letters were in fact written by Plato, although all of the thirty-six dialogues have some defenders. A further nine dialogues are ascribed to Plato but were considered spurious even in antiquity. Plato's dialogues feature Socrates, although not always as the leader of the conversation. (One dialogue, the Laws , instead contains an "Athenian Stranger".) Along with Xenophon , Plato is the primary source of information about Socrates' life and beliefs and it

12672-438: The main interlocutor in his dialogues , deriving from them the basis of Platonism (and by extension, Neoplatonism ). Plato's student Aristotle in turn criticized and built upon the doctrines he ascribed to Socrates and Plato, forming the foundation of Aristotelianism . Antisthenes founded the school that would come to be known as Cynicism and accused Plato of distorting Socrates' teachings. Zeno of Citium in turn adapted

12816-551: The manifestation of cognitive virtues instead of justification; or they deny that knowledge can be analyzed in terms of other phenomena. Another area in epistemology asks how people acquire knowledge. Often-discussed sources of knowledge are perception , introspection , memory , inference , and testimony . According to empiricists , all knowledge is based on some form of experience. Rationalists reject this view and hold that some forms of knowledge, like innate knowledge , are not acquired through experience. The regress problem

12960-507: The most famous is perhaps the Allegory of the Cave . It likens most humans to people tied up in a cave, who look only at shadows on the walls and have no other conception of reality. If they turned around, they would see what is casting the shadows (and thereby gain a further dimension to their reality). If some left the cave, they would see the outside world illuminated by the sun (representing

13104-552: The most famous of which is his theory of forms . It holds that non-material abstract (but substantial ) forms (or ideas), and not the material world of change known to us through our physical senses, possess the highest and most fundamental kind of reality. He argued extensively in the Phaedo , Phaedrus , and Republic for the immortality of the soul, and he believed specifically in reincarnation . Plato often uses long-form analogies (usually allegories ) to explain his ideas;

13248-596: The most fundamental level. Another subfield of metaphysics is philosophical cosmology . It is interested in the essence of the world as a whole. It asks questions including whether the universe has a beginning and an end and whether it was created by something else. A key topic in metaphysics concerns the question of whether reality only consists of physical things like matter and energy. Alternative suggestions are that mental entities (such as souls and experiences ) and abstract entities (such as numbers) exist apart from physical things. Another topic in metaphysics concerns

13392-419: The most influential philosophers of all time, stressed the implication that understanding relies upon first-hand observation. Aristotle moved to Athens from his native Stageira in 367 BC and began to study philosophy (perhaps even rhetoric, under Isocrates ), eventually enrolling at Plato's Academy . He left Athens approximately twenty years later to study botany and zoology , became a tutor of Alexander

13536-404: The most influential philosophers of the subsequent period. The increasing influence of Western thought and institutions in the 19th and 20th centuries gave rise to the intellectual movement of Islamic modernism , which aims to understand the relation between traditional Islamic beliefs and modernity. One of the distinguishing features of Indian philosophy is that it integrates the exploration of

13680-472: The natural and social sciences, religion, and mathematics. Epistemology is the branch of philosophy that studies knowledge. It is also known as theory of knowledge and aims to understand what knowledge is, how it arises, what its limits are, and what value it has. It further examines the nature of truth , belief , justification , and rationality . Some of the questions addressed by epistemologists include "By what method(s) can one acquire knowledge?"; "How

13824-504: The natural world. The Kyoto School emerged in the 20th century and integrated Eastern spirituality with Western philosophy in its exploration of concepts like absolute nothingness ( zettai-mu ), place ( basho ), and the self . Latin American philosophy in the pre-colonial period was practiced by indigenous civilizations and explored questions concerning the nature of reality and the role of humans. It has similarities to indigenous North American philosophy , which covered themes such as

13968-455: The nature and sources of morality. It analyzes the meaning of ethical concepts, like right action and obligation . It also investigates whether ethical theories can be true in an absolute sense and how to acquire knowledge of them. Normative ethics encompasses general theories of how to distinguish between right and wrong conduct. It helps guide moral decisions by examining what moral obligations and rights people have. Applied ethics studies

14112-471: The nature of reality, the ways of arriving at knowledge, and the spiritual question of how to reach enlightenment . It started around 900 BCE when the Vedas were written. They are the foundational scriptures of Hinduism and contemplate issues concerning the relation between the self and ultimate reality as well as the question of how souls are reborn based on their past actions . This period also saw

14256-477: The only human good, but he had also accepted a limited role for its utilitarian side, allowing pleasure to be a secondary goal of moral action. Aristippus and his followers seized upon this, and made pleasure the sole final goal of life, denying that virtue had any intrinsic value. The Megarian school flourished in the 4th century BC. It was founded by Euclides of Megara , one of the pupils of Socrates . Its ethical teachings were derived from Socrates, recognizing

14400-412: The oppositional processes ἔρις ( eris ), "strife", and hypothesized that the apparently stable state of δίκη ( dikê ), or "justice", is the harmonic unity of these opposites. Parmenides of Elea cast his philosophy against those who held "it is and is not the same, and all things travel in opposite directions,"—presumably referring to Heraclitus and those who followed him. Whereas the doctrines of

14544-507: The period of Middle Platonism , which absorbed ideas from the Peripatetic and Stoic schools. More extreme syncretism was done by Numenius of Apamea , who combined it with Neopythagoreanism . Also affected by the neopythagoreans, the neoplatonists , first of them Plotinus , argued that mind exists before matter, and that the universe has a singular cause which must therefore be a single mind. As such, neoplatonism became essentially

14688-436: The philosophical sense is the field that studies the nature and appreciation of beauty and other aesthetic properties, like the sublime . Although it is often treated together with the philosophy of art , aesthetics is a broader category that encompasses other aspects of experience, such as natural beauty. In a more general sense, aesthetics is "critical reflection on art, culture, and nature ". A key question in aesthetics

14832-417: The precise definition of the term and its meaning has changed throughout the ages. Metaphysicians attempt to answer basic questions including " Why is there something rather than nothing? "; "Of what does reality ultimately consist?"; and "Are humans free?" Metaphysics is sometimes divided into general metaphysics and specific or special metaphysics. General metaphysics investigates being as such. It examines

14976-666: The predominance of the "pre-Socratic" distinction. Since 2016, however, current scholarship has transitioned from calling philosophy before the Athenian school "pre-Socratic" to simply "Early Greek Philosophy". André Laks and Glenn W. Most have been partly responsible for popularizing this shift in describing the era preceding the Athenian School through their comprehensive, nine volume Loeb editions of Early Greek Philosophy . In their first volume, they distinguish their systematic approach from that of Hermann Diels, beginning with

15120-400: The problem of identity . One question is how much an entity can change while still remaining the same entity. According to one view, entities have essential and accidental features . They can change their accidental features but they cease to be the same entity if they lose an essential feature. A central distinction in metaphysics is between particulars and universals . Universals, like

15264-400: The problems of 'global/worldly' reality 'on' a 'cosmic-harmonic-balance' whole. There is a lack of creative 'Divine Spirit', which is compensated by the overall vision. Christian Revelation itself provides the Christian with an overview. Greek philosophy Ancient Greek philosophy arose in the 6th century BC. Philosophy was used to make sense of the world using reason. It dealt with

15408-428: The provocative, vexing, and enduring problems central to the human condition. The philosophical pursuit of wisdom involves asking general and fundamental questions. It often does not result in straightforward answers but may help a person to better understand the topic, examine their life, dispel confusion, and overcome prejudices and self-deceptive ideas associated with common sense. For example, Socrates stated that "

15552-539: The question of what political order would be best given those constraints; that question is addressed in the Laws , a dialogue that does not take place in Athens and from which Socrates is absent. The character of the society described there is eminently conservative, a corrected or liberalized timocracy on the Spartan or Cretan model or that of pre-democratic Athens . Plato's dialogues also have metaphysical themes,

15696-580: The rarefaction and condensation of the Milesians is impossible regarding Being; lastly, as movement requires that something exist apart from the thing moving (viz. the space into which it moves), the One or Being cannot move, since this would require that "space" both exist and not exist. While this doctrine is at odds with ordinary sensory experience, where things do indeed change and move, the Eleatic school followed Parmenides in denying that sense phenomena revealed

15840-436: The rational study of reality, knowledge, and values. It is distinguished from other disciplines of rational inquiry such as the empirical sciences and mathematics . The practice of philosophy is characterized by several general features: it is a form of rational inquiry, it aims to be systematic, and it tends to critically reflect on its own methods and presuppositions. It requires attentively thinking long and carefully about

15984-488: The same questions. Epistemology, ethics, logic, and metaphysics are sometimes listed as the main branches. There are many other subfields besides them and the different divisions are neither exhaustive nor mutually exclusive. For example, political philosophy, ethics, and aesthetics are sometimes linked under the general heading of value theory as they investigate normative or evaluative aspects. Furthermore, philosophical inquiry sometimes overlaps with other disciplines in

16128-410: The same way as the sciences. This problem is avoided by seeing philosophy as an immature or provisional science whose subdisciplines cease to be philosophy once they have fully developed. In this sense, philosophy is sometimes described as "the midwife of the sciences". Other definitions focus on the contrast between science and philosophy. A common theme among many such conceptions is that philosophy

16272-563: The scope and fundamental concepts of these fields. It also investigates their methods and ethical implications. The word philosophy comes from the Ancient Greek words φίλος ( philos ) ' love ' and σοφία ( sophia ) ' wisdom ' . Some sources say that the term was coined by the pre-Socratic philosopher Pythagoras , but this is not certain. The word entered the English language primarily from Old French and Anglo-Norman starting around 1175 CE. The French philosophie

16416-414: The starting point of Christian philosophy is the Christian religious message. Lara divides Christian philosophy into three eras: The philosophical starting point of Christian philosophy is logic, not excluding Christian theology . Although there is a relationship between theological doctrines and philosophical reflection in Christian philosophy, its reflections are strictly rational. On this way of seeing

16560-500: The state." Cynicism was founded by Antisthenes , who was a disciple of Socrates, as well as Diogenes , his contemporary. Their aim was to live according to nature and against convention. Antisthenes was inspired by the ascetism of Socrates, and accused Plato of pride and conceit. Diogenes, his follower, took the ideas to their limit, living in extreme poverty and engaging in anti-social behaviour. Crates of Thebes was, in turn, inspired by Diogenes to give away his fortune and live on

16704-400: The streets of Athens. The Cyrenaics were founded by Aristippus of Cyrene, who was a pupil of Socrates . The Cyrenaics were hedonists and held that pleasure was the supreme good in life, especially physical pleasure, which they thought more intense and more desirable than mental pleasures. Pleasure is the only good in life and pain is the only evil. Socrates had held that virtue was

16848-598: The study of the biggest patterns of the world as a whole or as the attempt to answer the big questions. Such an approach is pursued by Immanuel Kant , who holds that the task of philosophy is united by four questions: "What can I know?"; "What should I do?"; "What may I hope?"; and "What is the human being?" Both approaches have the problem that they are usually either too wide, by including non-philosophical disciplines, or too narrow, by excluding some philosophical sub-disciplines. Many definitions of philosophy emphasize its intimate relation to science. In this sense, philosophy

16992-469: The teachings of Advaita Vedanta to argue that all the different religions are valid paths toward the one divine. Chinese philosophy is particularly interested in practical questions associated with right social conduct, government, and self-cultivation . Many schools of thought emerged in the 6th century BCE in competing attempts to resolve the political turbulence of that period. The most prominent among them were Confucianism and Daoism . Confucianism

17136-659: The tradition of Christian philosophical thought or Judaism, from whom it was inherited from the Old Testament and more fundamentally in the Gospel message, which records or at the center of the message advocated by Christianity. Scholasticism received influence from both Jewish philosophy and Islamic philosophy . This Christian Europe did not remain exclusively influenced by itself, but it suffered strong influences from other cultures. The 'Divine Unity' (attempts) 'intercedes' to systematically and comprehensively systematize

17280-430: The two disciplines, if at least one of the premises of an argument is derived from revelation, the argument falls in the domain of theology; otherwise it falls into philosophy's domain. Fundamentally, Christian philosophical ideals are to make religious convictions rationally evident through natural reason. The Christian philosopher's attitude is determined by faith in matters relating to cosmology and everyday life. Unlike

17424-450: The ultimate form of goodness and truth). If these travelers then re-entered the cave, the people inside (who are still only familiar with the shadows) would not be equipped to believe reports of this 'outside world'. This story explains the theory of forms with their different levels of reality, and advances the view that philosopher-kings are wisest while most humans are ignorant. One student of Plato, Aristotle , who would become another of

17568-601: The unexamined life is not worth living " to highlight the role of philosophical inquiry in understanding one's own existence. And according to Bertrand Russell , "the man who has no tincture of philosophy goes through life imprisoned in the prejudices derived from common sense, from the habitual beliefs of his age or his nation, and from convictions which have grown up in his mind without the cooperation or consent of his deliberate reason." Attempts to provide more precise definitions of philosophy are controversial and are studied in metaphilosophy . Some approaches argue that there

17712-423: The void and creating the real material bodies. His theories were not well known by the time of Plato , however, and they were ultimately incorporated into the work of his student, Democritus . Sophism arose from the juxtaposition of physis (nature) and nomos (law). John Burnet posits its origin in the scientific progress of the previous centuries which suggested that Being was radically different from what

17856-578: The way to achieve eudaimonia. To bring the mind to ataraxia Pyrrhonism uses epoché ( suspension of judgment ) regarding all non-evident propositions. Pyrrhonists dispute that the dogmatists – which includes all of Pyrrhonism's rival philosophies – have found truth regarding non-evident matters. For any non-evident matter, a Pyrrhonist makes arguments for and against such that the matter cannot be concluded, thus suspending belief and thereby inducing ataraxia. Epicurus studied in Athens with Nausiphanes , who

18000-498: The world as it actually was; instead, the only thing with Being was thought, or the question of whether something exists or not is one of whether it can be thought. In support of this, Parmenides' pupil Zeno of Elea attempted to prove that the concept of motion was absurd and as such motion did not exist. He also attacked the subsequent development of pluralism, arguing that it was incompatible with Being. His arguments are known as Zeno's paradoxes . The power of Parmenides' logic

18144-455: Was Protagoras , whom he presents as teaching that all virtue is conventional. It was Protagoras who claimed that "man is the measure of all things, of the things that are, that they are, and of the things that are not, that they are not," which Plato interprets as a radical perspectivism , where some things seem to be one way for one person (and so actually are that way) and another way for another person (and so actually are that way as well);

18288-399: Was a follower of Democritus and a student of Pyrrho of Elis . He accepted Democritus' theory of atomism, with improvements made in response to criticisms by Aristotle and others. His ethics were based on "the pursuit of pleasure and the avoidance of pain". This was, however, not simple hedonism , as he noted that "We do not mean the pleasures of the prodigal or of sensuality . . . we mean

18432-472: Was a strong critic of the idea that reason can arrive at a true understanding of reality and God. He formulated a detailed critique of philosophy and tried to assign philosophy a more limited place besides the teachings of the Quran and mystical insight. Following Al-Ghazali and the end of the classical period, the influence of philosophical inquiry waned. Mulla Sadra (1571–1636 CE) is often regarded as one of

18576-483: Was based in materialism , which was structured by logos , reason (but also called God or fate). Their logical contributions still feature in contemporary propositional calculus . Their ethics was based on pursuing happiness, which they believed was a product of 'living in accordance with nature'. This meant accepting those things which one could not change. One could therefore choose whether to be happy or not by adjusting one's attitude towards their circumstances, as

18720-437: Was characterized by the emergence of the six orthodox schools of Hinduism : Nyāyá , Vaiśeṣika , Sāṃkhya , Yoga , Mīmāṃsā , and Vedanta . The school of Advaita Vedanta developed later in this period. It was systematized by Adi Shankara ( c.  700 –750 CE), who held that everything is one and that the impression of a universe consisting of many distinct entities is an illusion . A slightly different perspective

18864-430: Was closely associated with this new learning and a friend of Anaxagoras , however, and his political opponents struck at him by taking advantage of a conservative reaction against the philosophers; it became a crime to investigate the things above the heavens or below the earth, subjects considered impious. Anaxagoras is said to have been charged and to have fled into exile when Socrates was about twenty years of age. There

19008-660: Was defended by Ramanuja (1017–1137 CE), who founded the school of Vishishtadvaita Vedanta and argued that individual entities are real as aspects or parts of the underlying unity. He also helped to popularize the Bhakti movement , which taught devotion toward the divine as a spiritual path and lasted until the 17th to 18th centuries CE. The modern period began roughly 1800 CE and was shaped by encounters with Western thought. Philosophers tried to formulate comprehensive systems to harmonize diverse philosophical and religious teachings. For example, Swami Vivekananda (1863–1902 CE) used

19152-402: Was experienced by the senses and, if comprehensible at all, was not comprehensible in terms of order; the world in which people lived, on the other hand, was one of law and order, albeit of humankind's own making. At the same time, nature was constant, while what was by law differed from one place to another and could be changed. The first person to call themselves a sophist, according to Plato,

19296-511: Was founded by Confucius (551–479 BCE). It focused on different forms of moral virtues and explored how they lead to harmony in society. Daoism was founded by Laozi (6th century BCE) and examined how humans can live in harmony with nature by following the Dao or the natural order of the universe. Other influential early schools of thought were Mohism , which developed an early form of altruistic consequentialism , and Legalism , which emphasized

19440-512: Was how philosophical and scientific knowledge are created. Specific importance was given to the role of reason and sensory experience . Many of these innovations were used in the Enlightenment movement to challenge traditional authorities. Several attempts to develop comprehensive systems of philosophy were made in the 19th century, for instance, by German idealism and Marxism . Influential developments in 20th-century philosophy were

19584-449: Was kept at natural limit of consumption. 'Unnatural' trade, as opposed to the intended limit, was classified as the acquisition of wealth to attain more wealth instead of to purchase more goods. Cutting more along the grain of reality, Aristotle did not only set his mind on how to give people direction to make the right choices but wanted each person equipped with the tools to perform this moral duty. In his own words, "Property should be in

19728-467: Was manifested through Scholasticism . This is the period of medieval philosophy that extended until the 15th century, as pointed out by T. Adão Lara . From the 16th century onwards, Christian philosophy, with its theories, started to coexist with independent scientific and philosophical theories. The development of Christian ideas represents a break with the philosophy of the Greeks, bearing in mind that

19872-519: Was questioning and writings with philosophical characteristics in the Middle Ages, although religion and theology predominated. In this way it was established by dogmas, in some aspects, which did not prevent significant philosophical constructions. A Christian philosophy developed from predecessor philosophies. Justin is based on Greek philosophy, an academy in Augustine and Patristics. It is in

20016-449: Was shaped by Socrates (469–399 BCE), Plato (427–347 BCE), and Aristotle (384–322 BCE). They expanded the range of topics to questions like how people should act , how to arrive at knowledge , and what the nature of reality and mind is. The later part of the ancient period was marked by the emergence of philosophical movements, for example, Epicureanism , Stoicism , Skepticism , and Neoplatonism . The medieval period started in

20160-548: Was simply a rationalist whose successors are responsible for the mysticism in Pythagoreanism, or that he was actually the author of the doctrine; there is no way to know for certain. Pythagoras is said to have been a disciple of Anaximander and to have imbibed the cosmological concerns of the Ionians, including the idea that the cosmos is constructed of spheres, the importance of the infinite, and that air or aether

20304-419: Was so influenced by Socrates as presented by Plato that it is conventional to refer to philosophy developed prior to Socrates as pre-Socratic philosophy . The periods following this, up to and after the wars of Alexander the Great , are those of "Classical Greek" and " Hellenistic philosophy ", respectively. The convention of terming those philosophers who were active prior to the death of Socrates as

20448-696: Was such that Avicenna referred to him simply as "the Master"; Maimonides , Alfarabi , Averroes , and Aquinas as "the Philosopher". Aristotle opposed the utopian style of theorizing, deciding to rely on the understood and observed behaviors of people in reality to formulate his theories. Stemming from an underlying moral assumption that life is valuable, the philosopher makes a point that scarce resources ought to be responsibly allocated to reduce poverty and death. This 'fear of goods' led Aristotle to exclusively support 'natural' trades in which personal satiation

20592-573: Was such that some subsequent philosophers abandoned the monism of the Milesians, Xenophanes, Heraclitus, and Parmenides, where one thing was the arche . In place of this, they adopted pluralism , such as Empedocles and Anaxagoras . There were, they said, multiple elements which were not reducible to one another and these were set in motion by love and strife (as in Empedocles) or by Mind (as in Anaxagoras). Agreeing with Parmenides that there

20736-417: Was the attainment of ataraxia , after Arcesilaus the Academic skeptics did not hold up ataraxia as the central objective. The Academic skeptics focused on criticizing the dogmas of other schools of philosophy, in particular of the dogmatism of the Stoics . They acknowledged some vestiges of a moral law within, at best but a plausible guide, the possession of which, however, formed the real distinction between

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