Portal:Philosophy

The Philosophy Portal

A portal for Wikipedia's philosophy resources • 17,589 articles in English

Left to right: Plato, Kant, Nietzsche, Buddha, Confucius, Averroes

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 methods and assumptions.

Historically, many of 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 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 about right social conduct, government, and self-cultivation.

Major branches of philosophy are epistemology, ethics, logic, and metaphysics. Epistemology studies what knowledge 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 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 the scope and fundamental concepts of these fields. It also investigates their methods and ethical implications. (Full article...)

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Featured articles are displayed here, which represent some of the best content on English Wikipedia.

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Portrait of Priestley, 1801

Joseph Priestley (/ˈpriːstli/; 24 March 1733 – 6 February 1804) was an English chemist, Unitarian, natural philosopher, separatist theologian, grammarian, multi-subject educator and classical liberal political theorist. He published over 150 works, and conducted experiments in several areas of science.

Priestley is credited with his independent discovery of oxygen by the thermal decomposition of mercuric oxide, having isolated it in 1774. During his lifetime, Priestley's considerable scientific reputation rested on his invention of carbonated water, his writings on electricity, and his discovery of several "airs" (gases), the most famous being what Priestley dubbed "dephlogisticated air" (oxygen). Priestley's determination to defend phlogiston theory and to reject what would become the chemical revolution eventually left him isolated within the scientific community. (Full article...)
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Conatus is, for Baruch Spinoza, where "each thing, as far as it lies in itself, strives to persevere in its being."

In the philosophy of Baruch Spinoza, conatus (/koʊˈneɪtəs/; wikt:conatus; Latin for "effort; endeavor; impulse, inclination, tendency; undertaking; striving") is an innate inclination of a thing to continue to exist and enhance itself. This thing may be mind, matter, or a combination of both, and is often associated with God's will in a pantheist view of nature. The conatus may refer to the instinctive will to live of living organisms or to various metaphysical theories of motion and inertia. Today, conatus is rarely used in the technical sense, since classical mechanics uses concepts such as inertia and conservation of momentum that have superseded it. It has, however, been a notable influence on later thinkers such as Arthur Schopenhauer and Friedrich Nietzsche. (Full article...)
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The problem of religious language considers whether it is possible to talk about God meaningfully if the traditional conceptions of God as being incorporeal, infinite, and timeless, are accepted. Because these traditional conceptions of God make it difficult to describe God, religious language has the potential to be meaningless. Theories of religious language either attempt to demonstrate that such language is meaningless, or attempt to show how religious language can still be meaningful.

One prevalent position in Islamic philosophy holds that religious language is meaningful and positive, demonstrating the shared attributes of God and His creatures. According to this view, the semantic commonality of attributes between God and humans indicates ontological commonalities between them. This is because factual concepts refer to and are abstracted from realities in the external world. (Full article...)
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The tree of life as depicted by Ernst Haeckel in The Evolution of Man (1879) illustrates the 19th-century view of evolution as a progressive process leading towards man.

Evolutionary thought, the recognition that species change over time and the perceived understanding of how such processes work, has roots in antiquity. With the beginnings of modern biological taxonomy in the late 17th century, two opposed ideas influenced Western biological thinking: essentialism, the belief that every species has essential characteristics that are unalterable, a concept which had developed from medieval Aristotelian metaphysics, and that fit well with natural theology; and the development of the new anti-Aristotelian approach to science. Naturalists began to focus on the variability of species; the emergence of palaeontology with the concept of extinction further undermined static views of nature. In the early 19th century prior to Darwinism, Jean-Baptiste Lamarck proposed his theory of the transmutation of species, the first fully formed theory of evolution.

In 1858 Charles Darwin and Alfred Russel Wallace published a new evolutionary theory, explained in detail in Darwin's On the Origin of Species (1859). Darwin's theory, originally called descent with modification is known contemporarily as Darwinism or Darwinian theory. Unlike Lamarck, Darwin proposed common descent and a branching tree of life, meaning that two very different species could share a common ancestor. Darwin based his theory on the idea of natural selection: it synthesized a broad range of evidence from animal husbandry, biogeography, geology, morphology, and embryology. Debate over Darwin's work led to the rapid acceptance of the general concept of evolution, but the specific mechanism he proposed, natural selection, was not widely accepted until it was revived by developments in biology that occurred during the 1920s through the 1940s. Before that time most biologists regarded other factors as responsible for evolution. Alternatives to natural selection suggested during "the eclipse of Darwinism" (c. 1880 to 1920) included inheritance of acquired characteristics (neo-Lamarckism), an innate drive for change (orthogenesis), and sudden large mutations (saltationism). Mendelian genetics, a series of 19th-century experiments with pea plant variations rediscovered in 1900, was integrated with natural selection by Ronald Fisher, J. B. S. Haldane, and Sewall Wright during the 1910s to 1930s, and resulted in the founding of the new discipline of population genetics. During the 1930s and 1940s population genetics became integrated with other biological fields, resulting in a widely applicable theory of evolution that encompassed much of biology—the modern synthesis. (Full article...)
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The title-page of the 1759 edition published by Cramer in Geneva, which reads, "Candide, or Optimism, translated from the German of Dr. Ralph."

Candide, ou l'Optimisme (/kɒnˈdiːd/ kon-DEED, French: [kɑ̃did] ) is a French satire written by Voltaire, a philosopher of the Age of Enlightenment, first published in 1759. The novella has been widely translated, with English versions titled Candide: or, All for the Best (1759); Candide: or, The Optimist (1762); and Candide: Optimism (1947). A young man, Candide, lives a sheltered life in an Edenic paradise, being indoctrinated with Leibnizian optimism by his mentor, Professor Pangloss. This lifestyle is abruptly ended, followed by Candide's slow and painful disillusionment as he witnesses and experiences great hardships in the world. Voltaire concludes Candide with, if not rejecting Leibnizian optimism outright, advocating a deeply practical precept, "we must cultivate our garden", in lieu of the Leibnizian mantra of Pangloss, "all is for the best" in the "best of all possible worlds".

Candide is characterized by its tone as well as its erratic, fantastical, and fast-moving plot. A picaresque novel with a story akin to a serious bildungsroman, it parodies many adventure and romance clichés, in a tone that is bitter and matter-of-fact. The events discussed are often based on historical happenings. As philosophers of Voltaire's day contended with the problem of evil, so does Candide, albeit more directly and humorously. Voltaire ridicules religion, theologians, governments, armies, philosophies, and philosophers. Through Candide, he assaults Leibniz and his optimism. (Full article...)
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Bust of Shen at the Beijing Ancient Observatory

Shen Kuo (Chinese: 沈括; 1031–1095) or Shen Gua, courtesy name Cunzhong (存中) and pseudonym Mengqi (now usually given as Mengxi) Weng (夢溪翁), was a Chinese polymath, scientist, and statesman of the Song dynasty (960–1279). Shen was a master in many fields of study including mathematics, optics, and horology. In his career as a civil servant, he became a finance minister, governmental state inspector, head official for the Bureau of Astronomy in the Song court, Assistant Minister of Imperial Hospitality, and also served as an academic chancellor. At court his political allegiance was to the Reformist faction known as the New Policies Group, headed by Chancellor Wang Anshi (1021–1085).

In his Dream Pool Essays or Dream Torrent Essays (夢溪筆談; Mengxi Bitan) of 1088, Shen was the first to describe the magnetic needle compass, which would be used for navigation (first described in Europe by Alexander Neckam in 1187). Shen discovered the concept of true north in terms of magnetic declination towards the north pole, with experimentation of suspended magnetic needles and "the improved meridian determined by Shen's [astronomical] measurement of the distance between the pole star and true north". This was the decisive step in human history to make compasses more useful for navigation, and may have been a concept unknown in Europe for another four hundred years (evidence of German sundials made circa 1450 show markings similar to Chinese geomancers' compasses in regard to declination). (Full article...)
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Why Marx Was Right is a 2011 non-fiction book by the British academic Terry Eagleton about the 19th-century philosopher Karl Marx and the schools of thought, collectively known as Marxism, that arose from his work. Written for laypeople, Why Marx Was Right outlines ten objections to Marxism that they may hold and aims to refute each one in turn. These include arguments that Marxism is irrelevant owing to changing social classes in the modern world, that it is deterministic and utopian, and that Marxists oppose all reforms and believe in an authoritarian state.

In his counterarguments, Eagleton explains how class struggle is central to Marxism, and that history is seen as a progression of modes of production, like feudalism and capitalism, involving the materials, technology and social relations required to produce goods and services within the society. Under a capitalist economy, the working class, known as the proletariat, are those lacking significant autonomy over their labour conditions, and have no control over the means of production. Eagleton describes how revolutions could lead to a new mode of production—socialism—in which the working class have control, and an eventual communist society could make the state obsolete. He explores the failures of the Soviet Union and other Marxist–Leninist countries. (Full article...)
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Sir Bernard Arthur Owen Williams (21 September 1929 – 10 June 2003) was an English moral philosopher. His publications include Problems of the Self (1973), Ethics and the Limits of Philosophy (1985), Shame and Necessity (1993), and Truth and Truthfulness (2002). He was knighted in 1999.

As Knightbridge Professor of Philosophy at the University of Cambridge and Deutsch Professor of Philosophy at the University of California, Berkeley, Williams became known for his efforts to reorient the study of moral philosophy to psychology, history, and in particular to the Greeks. Described by Colin McGinn as an "analytical philosopher with the soul of a general humanist," he was skeptical about attempts to create a foundation for moral philosophy. Martha Nussbaum wrote that he demanded of philosophy that it "come to terms with, and contain, the difficulty and complexity of human life." (Full article...)
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Portrait of Rădulescu, by Mișu Popp

Ion Heliade Rădulescu or Ion Heliade (also known as Eliade or Eliade Rădulescu; Romanian pronunciation: [ˈi.on (h)eliˈade rəduˈlesku]; 6 January 1802 – 27 April 1872) was a Wallachian, later Romanian academic, Romantic and Classicist poet, essayist, memoirist, short story writer, newspaper editor and politician. A prolific translator of foreign literature into Romanian, he was also the author of books on linguistics and history. For much of his life, Heliade Rădulescu was a teacher at Saint Sava College in Bucharest, which he helped reopen. He was a founding member and first president of the Romanian Academy.

Heliade Rădulescu is considered one of the foremost champions of Romanian culture from the first half of the 19th century, having first risen to prominence through his association with Gheorghe Lazăr and his support of Lazăr's drive for discontinuing education in Greek. Over the following decades, he had a major role in shaping the modern Romanian language, but caused controversy when he advocated the massive introduction of Italian neologisms into the Romanian lexis. A Romantic nationalist landowner siding with moderate liberals, Heliade was among the leaders of the 1848 Wallachian revolution, after which he was forced to spend several years in exile. Adopting an original form of conservatism, which emphasized the role of the aristocratic boyars in Romanian history, he was rewarded for supporting the Ottoman Empire and clashed with the radical wing of the 1848 revolutionaries. (Full article...)
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Anekāntavāda (Sanskrit: अनेकान्तवाद, "many-sidedness") is the Jain doctrine about metaphysical truths that emerged in ancient India. It states that the ultimate truth and reality is complex and has multiple aspects and viewpoints.

According to Jainism, no single, specific statement can describe the nature of existence and the absolute truth. This knowledge (Kevala Jnana), it adds, is comprehended only by the Arihants. Other beings and their statements about absolute truth are incomplete, and at best a partial truth. All knowledge claims, according to the anekāntavāda doctrine must be qualified in many ways, including being affirmed and denied. Anekāntavāda is a fundamental doctrine of Jainism. (Full article...)
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Priestley, painted late in life by Rembrandt Peale (c. 1800)

Joseph Priestley (1733–1804) was a British natural philosopher, Dissenting clergyman, political theorist, theologian, and educator. He is best known for his discovery, simultaneously with Antoine Lavoisier, of oxygen gas.

A member of marginalized religious groups throughout his life and a proponent of what was called "rational Dissent," Priestley advocated religious toleration and equal rights for Dissenters. He argued for extensive civil rights in works such as the important Essay on the First Principles of Government, believing that individuals could bring about progress and eventually the Millennium; he was the foremost British expounder of providentialism. Priestley also made significant contributions to education, publishing, among other things, The Rudiments of English Grammar, a seminal work on English grammar. In his most lasting contributions to education, he argued for the benefits of a liberal arts education and of the value of the study of modern history. In his metaphysical works, Priestley "attempt[ed] to combine theism, materialism, and determinism," a project that has been called "audacious and original." (Full article...)
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Augustine of Hippo (AD 354–430) as painted by Sandro Botticelli (c. 1445–1510). Augustine is credited with developing the first form of the theodicy now named for him.

The Augustinian theodicy, named for the 4th- and 5th-century theologian and philosopher Augustine of Hippo, is a type of Christian theodicy that developed in response to the evidential problem of evil. As such, it attempts to explain the probability of an omnipotent (all-powerful) and omnibenevolent (all-loving) God amid evidence of evil in the world. A number of variations of this kind of theodicy have been proposed throughout history; their similarities were first described by the 20th-century philosopher John Hick, who classified them as "Augustinian". They typically assert that God is perfectly (ideally) good, that he created the world out of nothing, and that evil is the result of humanity's original sin. The entry of evil into the world is generally explained as consequence of original sin and its continued presence due to humans' misuse of free will and concupiscence. God's goodness and benevolence, according to the Augustinian theodicy, remain perfect and without responsibility for evil or suffering.

Augustine of Hippo was the first to develop the theodicy. He rejected the idea that evil exists in itself, instead regarding it as a corruption of goodness, caused by humanity's abuse of free will. Augustine believed in the existence of a physical Hell as a punishment for sin, but argued that those who choose to accept the salvation of Jesus Christ will go to Heaven. In the 13th century, Thomas Aquinas – influenced by Augustine – proposed a similar theodicy based on the view that God is goodness and that there can be no evil in him. He believed that the existence of goodness allows evil to exist, through the fault of humans. Augustine also influenced John Calvin, who supported Augustine's view that evil is the result of free will and argued that sin corrupts humans, requiring God's grace to give moral guidance. (Full article...)
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Cantor, c. 1910

Georg Ferdinand Ludwig Philipp Cantor (/ˈkæntɔːr/ KAN-tor; German: [ˈɡeːɔʁk ˈfɛʁdinant ˈluːtvɪç ˈfiːlɪp ˈkantoːɐ̯]; 3 March [O.S. 19 February] 1845 – 6 January 1918) was a mathematician who played a pivotal role in the creation of set theory, which has become a fundamental theory in mathematics. Cantor established the importance of one-to-one correspondence between the members of two sets, defined infinite and well-ordered sets, and proved that the real numbers are more numerous than the natural numbers. Cantor's method of proof of this theorem implies the existence of an infinity of infinities. He defined the cardinal and ordinal numbers and their arithmetic. Cantor's work is of great philosophical interest, a fact he was well aware of.

Originally, Cantor's theory of transfinite numbers was regarded as counter-intuitive – even shocking. This caused it to encounter resistance from mathematical contemporaries such as Leopold Kronecker and Henri Poincaré and later from Hermann Weyl and L. E. J. Brouwer, while Ludwig Wittgenstein raised philosophical objections; see Controversy over Cantor's theory. Cantor, a devout Lutheran Christian, believed the theory had been communicated to him by God. Some Christian theologians (particularly neo-Scholastics) saw Cantor's work as a challenge to the uniqueness of the absolute infinity in the nature of God – on one occasion equating the theory of transfinite numbers with pantheism – a proposition that Cantor vigorously rejected. Not all theologians were against Cantor's theory; prominent neo-scholastic philosopher Konstantin Gutberlet [de; it] was in favor of it and Cardinal Johann Baptist Franzelin accepted it as a valid theory (after Cantor made some important clarifications). (Full article...)
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Confirmation bias (also confirmatory bias, myside bias, or congeniality bias) is the tendency to search for, interpret, favor and recall information in a way that confirms or supports one's prior beliefs or values. People display this bias when they select information that supports their views, ignoring contrary information or when they interpret ambiguous evidence as supporting their existing attitudes. The effect is strongest for desired outcomes, for emotionally charged issues and for deeply entrenched beliefs.

Biased search for information, biased interpretation of this information and biased memory recall, have been invoked to explain four specific effects:
1. attitude polarization (when a disagreement becomes more extreme even though the different parties are exposed to the same evidence)
2. belief perseverance (when beliefs persist after the evidence for them is shown to be false)
3. the irrational primacy effect (a greater reliance on information encountered early in a series)
4. illusory correlation (when people falsely perceive an association between two events or situations).
(Full article...)
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Intelligent design (ID) is a pseudoscientific argument for the existence of God, presented by its proponents as "an evidence-based scientific theory about life's origins". Proponents claim that "certain features of the universe and of living things are best explained by an intelligent cause, not an undirected process such as natural selection." ID is a form of creationism that lacks empirical support and offers no testable or tenable hypotheses, and is therefore not science. The leading proponents of ID are associated with the Discovery Institute, a Christian, politically conservative think tank based in the United States.

Although the phrase intelligent design had featured previously in theological discussions of the argument from design, its first publication in its present use as an alternative term for creationism was in Of Pandas and People, a 1989 creationist textbook intended for high school biology classes. The term was substituted into drafts of the book, directly replacing references to creation science and creationism, after the 1987 Supreme Court's Edwards v. Aguillard decision barred the teaching of creation science in public schools on constitutional grounds. From the mid-1990s, the intelligent design movement (IDM), supported by the Discovery Institute, advocated inclusion of intelligent design in public school biology curricula. This led to the 2005 Kitzmiller v. Dover Area School District trial, which found that intelligent design was not science, that it "cannot uncouple itself from its creationist, and thus religious, antecedents", and that the public school district's promotion of it therefore violated the Establishment Clause of the First Amendment to the United States Constitution. (Full article...)

Did you know (auto-generated) - load new batch

... that Heinrich Nidecker accused Samuel Taylor Coleridge of having committed plagiarism in his philosophical tract Theory of Life?
... that diverse fields study the mind, including psychology, neuroscience, cognitive science, and philosophy?
... that by popular demand, philosopher Anton Charles Pegis continued to teach graduate classes for three years after becoming an emeritus professor?
... that political philosophy professor Werner J. Dannhauser was the basis for a character in a Saul Bellow novel?
... that Stellar Blade's Eve was described as "a woman born from South Korea's culture and philosophy" by The Washington Post?
... that according to some metaphysicians, there are no relations?
... that the history of philosophy in India is characterized by its combined interest in the nature of reality, the ways of arriving at knowledge, and the spiritual question of how to reach enlightenment?
... that a report by the philosopher Jonathan Birch and colleagues led to cephalopods and decapods being recognised as sentient under the UK's Animal Welfare (Sentience) Act?

Selected philosopher of the week

Michael Ruse (born June 21, 1940 in Birmingham, England) is a philosopher of science, working on the philosophy of the biology, and is well known for his work on the argument between creationism and evolutionary biology. He was born in England, took his undergraduate degree at the University of Bristol (1962), his master's degree at McMaster University, Hamilton, Ontario (1964), and Ph.D. at the University of Bristol (1970). Ruse taught at the University of Guelph Canada for 35 years. Since his retirement from Guelph, he has taught at Florida State University and is, since 2000, the Lucyle T. Werkmeister Professor of Philosophy. In 1986, he was elected as a Fellow of both the Royal Society of Canada and the American Association for the Advancement of Science. He has received honorary doctorates from the University of Bergen, Norway (1990) and the McMaster University, Ontario, Canada (2003).

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Selected article of the week

Decision theory is an interdisciplinary area of study, related to and of interest to practitioners in mathematics, statistics, economics, philosophy, management and psychology. It is concerned with how real decision-makers make decisions, and with how optimal decisions can be reached.

Most of decision theory is normative or prescriptive, i.e. it is concerned with identifying the best decision to take, assuming an ideal decision taker who is fully informed, able to compute with perfect accuracy, and fully rational. The practical application of this prescriptive approach (how people should make decisions) is called decision analysis, and aimed at finding tools, methodologies and software to help people make better decisions. The most systematic and comprehensive software tools developed in this way are called decision support systems.

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Good articles - load new batch

These are Good articles, which meet a core set of high editorial standards.

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Clement depicted in 1584

Titus Flavius Clemens, also known as Clement of Alexandria (Ancient Greek: Κλήμης ὁ Ἀλεξανδρεύς; c. 150 – c. 215 AD), was a Christian theologian and philosopher who taught at the Catechetical School of Alexandria. Among his pupils were Origen and Alexander of Jerusalem. A convert to Christianity, he was an educated man who was familiar with classical Greek philosophy and literature. As his three major works demonstrate, Clement was influenced by Hellenistic philosophy to a greater extent than any other Christian thinker of his time, and in particular, by Plato and the Stoics. His secret works, which exist only in fragments, suggest that he was familiar with pre-Christian Jewish esotericism and Gnosticism as well. In one of his works he argued that Greek philosophy had its origin among non-Greeks, claiming that both Plato and Pythagoras were taught by Egyptian scholars.

Clement is usually regarded as a Church Father. He is venerated as a saint in Coptic Christianity, Eastern Catholicism, Ethiopian Christianity, and Anglicanism. He was revered in Western Catholicism until 1586, when his name was removed from the Roman Martyrology by Pope Sixtus V on the advice of Baronius. The Eastern Orthodox Church officially stopped any veneration of Clement of Alexandria in the 10th century. Nonetheless, he is still sometimes referred to as "Saint Clement of Alexandria" by both Eastern Orthodox and Catholic authors. (Full article...)
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Power: A New Social Analysis by Bertrand Russell (1st imp. London 1938, Allen & Unwin, 328 pp.) is a work in social philosophy written by Bertrand Russell. Power, for Russell, is one's ability to achieve goals. In particular, Russell has in mind social power, that is, power over people.

The volume contains a number of arguments. However, four themes have a central role in the overall work. The first theme given treatment in the analysis is that the lust for power is a part of human nature. Second, the work emphasises that there are different forms of social power, and that these forms are substantially interrelated. Third, Power insists that "organisations are usually connected with certain kinds of individuals". Finally, the work ends by arguing that "arbitrary rulership can and should be subdued". (Full article...)
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Icon of Gregory
14th-century fresco, Chora Church, Istanbul

Gregory of Nyssa, also known as Gregory Nyssen (Ancient Greek: Γρηγόριος Νύσσης or Γρηγόριος Νυσσηνός; c. 335 – c. 394), was an early Roman Christian prelate who served as Bishop of Nyssa from 372 to 376 and from 378 to his death. He is venerated as a saint in Eastern Orthodoxy, Catholicism, Oriental Orthodoxy, Anglicanism, and Lutheranism. Gregory; his elder brother, Basil of Caesarea; and their friend Gregory of Nazianzus are collectively known as the Cappadocian Fathers.

Gregory lacked the administrative ability of his brother Basil or the contemporary influence of Gregory of Nazianzus, but he was an erudite Christian theologian who made significant contributions to the doctrine of the Trinity and the Nicene Creed. Gregory's philosophical writings were influenced by Origen. Since the mid-twentieth century, there has been a significant increase in interest in Gregory's works from the academic community, particularly involving universal salvation, which has resulted in challenges to many traditional interpretations of his theology. (Full article...)
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Portrait of Saint Augustine, the oldest proponent of the Divine command theory

Divine command theory (also known as theological voluntarism) is a meta-ethical theory which proposes that an action's status as morally good is equivalent to whether it is commanded by God. The theory asserts that what is moral is determined by God's commands and that for a person to be moral he is to follow God's commands. Followers of both monotheistic and polytheistic religions in ancient and modern times have often accepted the importance of God's commands in establishing morality.

Numerous variants of the theory have been presented: historically, figures including Saint Augustine, Duns Scotus, William of Ockham and Søren Kierkegaard have presented various versions of divine command theory; more recently, Robert Merrihew Adams has proposed a "modified divine command theory" based on the omnibenevolence of God in which morality is linked to human conceptions of right and wrong. Paul Copan has argued in favour of the theory from a Christian viewpoint, and Linda Trinkaus Zagzebski's divine motivation theory proposes that God's motivations, rather than commands, are the source of morality. (Full article...)
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Keynes in 1929

John Maynard Keynes, 1st Baron Keynes (/keɪnz/ KAYNZ; 5 June 1883 – 21 April 1946), was an English economist and philosopher whose ideas fundamentally changed the theory and practice of macroeconomics and the economic policies of governments. Originally trained in mathematics, he built on and greatly refined earlier work on the causes of business cycles. One of the most influential economists of the 20th century, he produced writings that are the basis for the school of thought known as Keynesian economics, and its various offshoots. His ideas, reformulated as New Keynesianism, are fundamental to mainstream macroeconomics. He is known as the "father of macroeconomics".

During the Great Depression of the 1930s, Keynes spearheaded a revolution in economic thinking, challenging the ideas of neoclassical economics that held that free markets would, in the short to medium term, automatically provide full employment, as long as workers were flexible in their wage demands. He argued that aggregate demand (total spending in the economy) determined the overall level of economic activity, and that inadequate aggregate demand could lead to prolonged periods of high unemployment, and since wages and labour costs are rigid downwards the economy will not automatically rebound to full employment. Keynes advocated the use of fiscal and monetary policies to mitigate the adverse effects of economic recessions and depressions. After the 1929 crisis, Keynes also turned away from a fundamental pillar of neoclassical economics: free trade. He criticized Ricardian comparative advantage theory (the foundation of free trade), considering the theory's initial assumptions unrealistic, and became definitively protectionist. He detailed these ideas in his magnum opus, The General Theory of Employment, Interest and Money, published in early 1936. By the late 1930s, leading Western economies had begun adopting Keynes's policy recommendations. Almost all capitalist governments had done so by the end of the two decades following Keynes's death in 1946. As a leader of the British delegation, Keynes participated in the design of the international economic institutions established after the end of World War II but was overruled by the American delegation on several aspects. (Full article...)
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Song Dynasty officials listening to guqin.

The Song dynasty (960–1279 AD) was a culturally rich and sophisticated age for China. It saw great advancements in the visual arts, music, literature, and philosophy. Officials of the ruling bureaucracy, who underwent a strict and extensive examination process, reached new heights of education in Chinese society, while general Chinese culture was enhanced by widespread printing, growing literacy, and various arts.

Appreciation of art among the gentry class flourished during the Song dynasty, especially in regard to paintings, which is an art practiced by many. Trends in painting styles amongst the gentry notably shifted from the Northern (960–1127) to Southern Song (1127–1279) periods, influenced in part by the gradual embrace of the Neo-Confucian political ideology at court. (Full article...)
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Whitehead c. 1924

Alfred North Whitehead (15 February 1861 – 30 December 1947) was an English mathematician and philosopher. He created the philosophical school known as process philosophy, which has been applied in a wide variety of disciplines, including ecology, theology, education, physics, biology, economics, and psychology.

In his early career Whitehead wrote primarily on mathematics, logic, and physics. He wrote the three-volume Principia Mathematica (1910–1913), with his former student Bertrand Russell. Principia Mathematica is considered one of the twentieth century's most important works in mathematical logic, and placed 23rd in a list of the top 100 English-language nonfiction books of the twentieth century by Modern Library. (Full article...)
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Statue of Krishna at Sri Mariamman Temple, Singapore

Krishna (/ˈkrɪʃnə/; Sanskrit: कृष्ण, IAST: Kṛṣṇa [ˈkr̩ʂɳɐ]) is a major deity in Hinduism. He is worshipped as the eighth avatar of Vishnu and also as the Supreme God in his own right. He is the god of protection, compassion, tenderness, and love; and is widely revered among Hindu divinities. Krishna's birthday is celebrated every year by Hindus on Krishna Janmashtami according to the lunisolar Hindu calendar, which falls in late August or early September of the Gregorian calendar.

The anecdotes and narratives of Krishna's life are generally titled as Krishna Līlā. He is a central figure in the Mahabharata, the Bhagavata Purana, the Brahma Vaivarta Purana, and the Bhagavad Gita, and is mentioned in many Hindu philosophical, theological, and mythological texts. They portray him in various perspectives: as a god-child, a prankster, a model lover, a divine hero, and the universal supreme being. His iconography reflects these legends and shows him in different stages of his life, such as an infant eating butter, a young boy playing a flute, a handsome youth with Radha or surrounded by female devotees, or a friendly charioteer giving counsel to Arjuna. (Full article...)
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Robert of Melun (c. 1100 – 27 February 1167) was an English scholastic Christian theologian who taught in France, and later became Bishop of Hereford in England. He studied under Peter Abelard in Paris before teaching there and at Melun, which gave him his surname. His students included John of Salisbury, Roger of Worcester, William of Tyre, and possibly Thomas Becket. Robert was involved in the Council of Reims in 1148, which condemned the teachings of Gilbert de la Porrée. Three of his theological works survive, and show him to have been strictly orthodox.

Robert returned to England in 1160, and was appointed Bishop of Hereford in 1163. King Henry II of England appointed him to the see, or bishopric, and was influenced in his decision by Pope Alexander III and Thomas Becket. Following his consecration, Robert became involved in the dispute between Becket and the king, during which he generally took the king's side. He also served as a papal and a royal judge. (Full article...)
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Brindavana (tomb) of Satyanatha Tirtha at Veeracholapuram

Satyanatha Tirtha (also known as Satyanatha Yati) (Sanskrit:सत्यनाथा तीर्थ); IAST:Śrī Satyanātha Tīrtha) (c.1648 – c.1674), also called Abhinava Vyasaraja, was a Hindu philosopher, scholar, theologian, logician and dialectician belonging to the Dvaita order of Vedanta. He served as the twentieth pontiff of Uttaradi Math from 1660 to 1673. He was a fiery and prolific writer and very ambitious of the glory of Dvaita Vedanta. He is considered to be one of the stalwarts in the history of the Dvaita school of thought, on account of his sound elucidations of the works of Madhvacharya, Jayatirtha and Vyasatirtha. Three of his polemically themed doxographical works (Abhinavamruta, Abhinava Chandrika and Abhinava Tarkatandava) are reminiscent of "Vyasatraya" (the three eyes of the man-lion of Madhva Siddhāntha). His refutation work Abhinava Gada is a devastating criticism of Appayya's Madhvamathamukhamardhana. His independent treatise Abhinava Chandrika is considered a brilliant work relating to the Brahma Sūtras, being a commentary on Jayatirtha's Tattvaprakashika. His work Abhinava Tarka Tandava refuted the works of rival systems, especially those of Prabhākara of Mimamsa, Ramanuja's Visistadvaita, and Gangesha Upadhyaya, Raghunatha Siromani of the Nyaya school, on the same lines as Vyasatirtha's Tarka Tandava. Indologist B.N.K.Sharma wrote, "His energy and determination to crush out the rivalry of Monism is reflected even in the choice of the titles of some of his works, four of which go by the name "Paraśus" (the Axe)".

Born into a family of scholars, Satyanatha Tirtha studied the six orthodox schools of Hinduism and subsequently, the philosophy of Dvaita under Satyanidhi Tirtha of Uttaradi Math, eventually succeeding him as the pontiff. B.N.K.Sharma wrote, "Satyanatha Tirtha made a bold pronouncement that women and Shudras are eligible for Aparokshajnana exclusively through shravana of Tantra". Sharma also wrote, "Satyanatha holds the memory of Vyasatirtha in warm admiration and refers him reverentially as Vyāsatīrthasrimaccaranah". He composed 12 works, consisting of commentaries on the works of Madhva, Jayatirtha and Vyasatirtha, and several independent treatises criticizing the tenets of contemporary schools, especially Advaita, while simultaneously elaborating upon the Dvaita thought. His dialectical skill and logical acumen is often compared with that of Vyasatirtha. (Full article...)
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Title page of the second edition.

Letters from an American Farmer is a series of letters written by French American writer J. Hector St. John de Crèvecœur, first published in 1782. The considerably longer title under which it was originally published is Letters from an American Farmer; Describing Certain Provincial Situations, Manners, and Customs not Generally Known; and Conveying Some Idea of the Late and Present Interior Circumstances of the British Colonies in North America. The twelve letters cover a wide range of topics, from the emergence of an American identity to the slave trade.

Crèvecœur wrote Letters during a period of seven years prior to the American Revolutionary War, while farming in the fertile Greycourt, blackdirt region of Chester, a small town in Orange County, New York. It is told from the viewpoint of a fictional narrator in correspondence with an English gentleman, and each letter concerns a different aspect of life or location in the British colonies of America. The work incorporates a number of styles and genres, including documentary, as well as sociological observations. (Full article...)
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The Bhikshuka Upanishad describes Hindu mendicants who seek spiritual liberation through the practise of yoga

The Bhikshuka Upanishad (Sanskrit: भिक्षुक उपनिषत्, IAST: Bhikṣuka Upaniṣad), also known as Bhikshukopanishad, is one of the minor Upanishads of Hinduism and is written in Sanskrit.

The Upanishad describes four kinds of sannyasins (Hindu monks), their eating habits and lifestyle. Yoga is the path of spiritual liberation for all four. Of these, the Paramahamsa monks are discussed in this text at greater length, and described as loners who are patient with everyone, free from dualism in their thoughts, and who meditate on their soul and the Brahman. (Full article...)
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Henle in 1972

Robert John Henle (September 12, 1909 – January 20, 2000) was an American Catholic priest, Jesuit, and philosopher who was the president of Georgetown University from 1969 to 1976. Born in Iowa, Henle entered the Society of Jesus in 1927. He taught high school classics and published a series of instructional books on Latin, one of which became widely used. He then became a professor at Saint Louis University and was known as one of the leaders of the revival of Thomistic philosophy and theology. He also served as a dean and vice president for nearly 20 years. In this latter capacity, he oversaw Saint Louis University's growing independence from, but continuing affiliation with, the Jesuit order.

In 1969, Henle was named the president of Georgetown University. He presided over an era of rapid growth and a diversifying student body. The student population grew and Henle stabilized the university's finances. Women were admitted for the first time to Georgetown College, the last all-male school at the university, while the number of black students increased. He also hired John Thompson, one of the first black coaches of a major collegiate basketball team, who later led the team to an NCAA championship in 1984. (Full article...)
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New Age is a range of spiritual or religious practices and beliefs that rapidly grew in Western society during the early 1970s. Its highly eclectic and unsystematic structure makes a precise definition difficult. Although many scholars consider it a religious movement, its adherents typically see it as spiritual or as a unification of mind, body, and spirit, and rarely use the term New Age themselves. Scholars often call it the New Age movement, although others contest this term and suggest it is better seen as a milieu or zeitgeist.

As a form of Western esotericism, the New Age drew heavily upon esoteric traditions such as the occultism of the eighteenth and nineteenth centuries, including the work of Emanuel Swedenborg and Franz Mesmer, as well as Spiritualism, New Thought, and Theosophy. More immediately, it arose from mid-20th-century influences such as the UFO religions of the 1950s, the counterculture of the 1960s, and the Human Potential Movement. Its exact origins remain contested, but it became a major movement in the 1970s, at which time it was centered largely in the United Kingdom. It expanded widely in the 1980s and 1990s, in particular in the United States. By the start of the 21st century, the term New Age was increasingly rejected within this milieu, with some scholars arguing that the New Age phenomenon had ended. (Full article...)
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Florian Witold Znaniecki (Polish: [znaˈɲɛt͡skʲi]; 15 January 1882 – 23 March 1958) was a Polish-born American philosopher and sociologist who taught and wrote in Poland and in the United States. Over the course of his work, he shifted his focus from philosophy to sociology. He remains a major figure in the history of Polish and American sociology; the founder of Polish academic sociology, and of an entire school of thought in sociology.

He won international renown as co-author, with William I. Thomas, of the study, The Polish Peasant in Europe and America (1918–1920), which is considered the foundation of modern empirical sociology. He also made major contributions to sociological theory, introducing terms such as "humanistic coefficient" and "culturalism". (Full article...)

General images - load new batch

The following are images from various philosophy-related articles on Wikipedia.

Image 1Portrait of Immanuel Kant, c. 1790 (from Western philosophy)
Image 2Bertrand Russell (from Western philosophy)
Image 3Adi Shankara (8th century CE) the main exponent of Advaita Vedānta (from Eastern philosophy)
Image 4Martin Heidegger (from Western philosophy)
Image 5Abbo of Fleury (from Medieval philosophy)
Image 6Bronze statue of Giordano Bruno by Ettore Ferrari, Campo de' Fiori, Rome (from Western philosophy)
Image 7William James in 1906 (from Western philosophy)
Image 8The philosopher Pyrrho of Elis, in an anecdote taken from Sextus Empiricus' Outlines of Pyrrhonism
(upper)PIRRHO • HELIENSIS •
PLISTARCHI • FILIVS
translation (from Latin): Pyrrho • Greek • Son of Plistarchus

(middle)OPORTERE • SAPIENTEM
HANC ILLIVS IMITARI
SECVRITATEMtranslation (from Latin): It is right wisdom then that all imitate this security (Pyrrho pointing at a peaceful pig munching his food)

(lower)Whoever wants to apply the real wisdom, shall not mind trepidation and misery
(from Ancient Greek philosophy)
Image 9Søren Kierkegaard, sketch by Niels Christian Kierkegaard, c. 1840 (from Western philosophy)
Image 10Edmund Husserl, in the 1910s (from Western philosophy)
Image 11Valluvar, the Tamil philosopher of the post-Sangam era (from Eastern philosophy)
Image 12Sigmund Freud by Max Halberstadt, c. 1921 (from Western philosophy)
Image 13Ionia, source of early Greek philosophy, in western Asia Minor (from Western philosophy)
Image 14Saint Augustine. (from Western philosophy)
Image 15Avicenna (from Medieval philosophy)
Image 16Friedrich Nietzsche, photograph by Friedrich Hartmann, c. 1875 (from Western philosophy)
Image 17Erasmus is Credited as the Prince of the Humanists (from Western philosophy)
Image 18Map of Alexander the Great's empire and the route he and Pyrrho of Elis took to India (from Western philosophy)
Image 19St. Anselm of Canterbury is credited as the founder of scholasticism. (from Western philosophy)
Image 20Xiong Shili circa 1960 (from Eastern philosophy)
Image 21Portrait by Philippe de Champaigne, 17th century (from Medieval philosophy)
Image 22Gottfried Wilhelm Leibniz, 1695 (from Western philosophy)
Image 23Portrait of René Descartes, after Frans Hals, second half of 17th century (from Western philosophy)
Image 24Gottlob Frege, c. 1905 (from Western philosophy)
Image 25Aristotle in The School of Athens, by Raphael (from Western philosophy)
Image 26Hu Shih and DT Suzuki during his visit to China in 1934 (from Eastern philosophy)
Image 27The Seven Sages of the Bamboo Grove, embroidery, 1860–1880 (from Eastern philosophy)
Image 28Pyrrho of Elis, marble head, Roman copy, Archaeological Museum of Corfu (from Western philosophy)
Image 29Confucius (from Eastern philosophy)
Image 30Ferdinand de Saussure (from Western philosophy)
Image 31Bust of Socrates, Roman copy after a Greek original from the 4th century BCE (from Western philosophy)
Image 32Four Greek philosophers: Socrates, Antisthenes, Chrysippos, Epicurus; British Museum (from Ancient Greek philosophy)
Image 33Portrait of David Hume, by Allan Ramsay, 1754 (from Western philosophy)
Image 34Portrait of John Locke, by Sir Godfrey Kneller, 1697 (from Western philosophy)
Image 35Fukuzawa Yukichi (1862) a key civil rights activist and liberal thinker (from Eastern philosophy)
Image 36Patricia Churchland, 2005 (from Western philosophy)
Image 37Georg Wilhelm Friedrich Hegel, steel engraving, after 1828 (from Western philosophy)
Image 38The Buddhist Nalanda university and monastery was a major center of learning in India from the 5th century CE to c. 1200. (from Eastern philosophy)
Image 39From left to right: Virchand Gandhi, Anagarika Dharmapala, Swami Vivekananda, G. Bonet Maury. Parliament of World Religions, 1893 (from Eastern philosophy)

Selected pictures

Image 1A statue of peripatetic philosopher and botanist Theophrastus at the Palermo Botanical Gardens.
Image 2Oscar Wilde reclining with Poems, by Napoleon Sarony, in New York in 1882. Wilde often liked to appear idle, though in fact he worked hard; by the late 1880s he was a father, an editor, and a writer.
Image 3Umberto Eco (1932–2016) was an Italian novelist, literary critic, philosopher, semiotician, and university professor. He is widely known for his 1980 novel Il nome della rosa (The Name of the Rose), a historical mystery combining semiotics in fiction with biblical analysis, medieval studies, and literary theory.
Image 4Lady Dorothy Browne and Sir Thomas Browne is an oil on panel painting attributed to the English artist Joan Carlile, and probably completed between 1641 and 1650. The painting depicts English physician Thomas Browne and his wife Dorothy.
Image 5Voltairine de Cleyre (1866–1912) was an American anarchist known for being a prolific writer and speaker who opposed state power, the capitalism she saw as interconnected with it, and marriage, and the domination of religion over sexuality and women's lives. She is often characterized as a major early feminist because of her views.
Image 6The House Builders (Portraits of Sir W.E. & The Hon. Lady Welby-Gregory), an 1880 painting by Frank Dicksee
Image 7The statue of Immanuel Kant in front of the Immanuel Kant State University of Russia in Kaliningrad. The statue was made by notable sculptor Christian Daniel Rauch and unveiled in 1864. The statue was destroyed in 1945, but was remoulded in 1992 on the initiative of Marion Dönhoff.
Image 8Carl von Linné, Alexander Roslin, 1775 (oil on canvas, Gripsholm Castle). Linnaeus was a Swedish botanist, zoologist, and physician who formalised binomial nomenclature, the modern system of naming organisms. He is known as the "father of modern taxonomy".
Image 9Friedrich Schiller (1759–1805) was a German poet, philosopher, physician, historian and playwright.
Image 10Painting of Gottfried Wilhelm Leibniz by Christoph Bernhard Francke, Braunschweig, Herzog Anton Ulrich Museum, 1700.
Image 11Adam Smith (baptised 16 June 1723 – died 17 July 1790 [OS: 5 June 1723 – 17 July 1790]) was a Scottish moral philosopher and a pioneer of political economics. One of the key figures of the Scottish Enlightenment, Smith is the author of The Theory of Moral Sentiments and An Inquiry into the Nature and Causes of the Wealth of Nations. The latter, usually abbreviated as The Wealth of Nations, is considered his magnum opus and the first modern work of economics. Smith is widely cited as the father of modern economics.
Image 12Jane Addams (1860–1935) was an American settlement activist, reformer, social worker, sociologist, public administrator and author. She was a notable figure in the history of social work and women's suffrage in the United States and an advocate for world peace.
Image 13The center third of Education (1890), a stained glass window by Louis Comfort Tiffany and Tiffany Studios, located in Linsly-Chittenden Hall at Yale University. It depicts Science (personified by Devotion, Labor, Truth, Research and Intuition) and Religion (personified by Purity, Faith, Hope, Reverence and Inspiration) in harmony, presided over by the central personification of "Light·Love·Life".
Image 14Niels Bohr (1885–1962) was a Danish physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922. Bohr was also a philosopher and a promoter of scientific research.
Image 15Philosophy, an 1896 mural by Robert Lewis Reid in the North Corridor on the Second Floor of the Library of Congress Thomas Jefferson Building, Washington, D.C.. The caption underneath reads: "HOW CHARMING IS DIVINE PHILOSOPHY."
Image 16Leo Tolstoy in 1897. Count Lev Nikolayevich Tolstoy was a Russian writer who is regarded as one of the greatest authors of all time.
Image 17Plato (left) and Aristotle (right), a detail of The School of Athens, a fresco by Raphael. Aristotle gestures to the earth, representing his belief in knowledge through empirical observation and experience, while holding a copy of his Nicomachean Ethics in his hand, whilst Plato gestures to the heavens, representing his belief in The Forms.

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Academic Branches of Philosophy

Philosophy ponders the most fundamental questions humankind has been able to ask. These are increasingly numerous and over time they have been arranged into the overlapping branches of the philosophy tree:

Aesthetics: What is art? What is beauty? Is there a standard of taste? Is art meaningful? If so, what does it mean? What is good art? Is art for the purpose of an end, or is "art for art's sake?" What connects us to art? How does art affect us? Is some art unethical? Can art corrupt or elevate societies?
Epistemology: What are the nature and limits of knowledge? What is more fundamental to human existence, knowing (epistemology) or being (ontology)? How do we come to know what we know? What are the limits and scope of knowledge? How can we know that there are other minds (if we can)? How can we know that there is an external world (if we can)? How can we prove our answers? What is a true statement?
Ethics: Is there a difference between ethically right and wrong actions (or values, or institutions)? If so, what is that difference? Which actions are right, and which wrong? Do divine commands make right acts right, or is their rightness based on something else? Are there standards of rightness that are absolute, or are all such standards relative to particular cultures? How should I live? What is happiness?
Logic: What makes a good argument? How can I think critically about complicated arguments? What makes for good thinking? When can I say that something just does not make sense? Where is the origin of logic?
Metaphysics: What sorts of things exist? What is the nature of those things? Do some things exist independently of our perception? What is the nature of space and time? What is the relationship of the mind to the body? What is it to be a person? What is it to be conscious? Do gods exist?
Political philosophy: Are political institutions and their exercise of power justified? What is justice? Is there a 'proper' role and scope of government? Is democracy the best form of governance? Is governance ethically justifiable? Should a state be allowed? Should a state be able to promote the norms and values of a certain moral or religious doctrine? Are states allowed to go to war? Do states have duties against inhabitants of other states?