Portal:Philosophy

The Philosophy Portal

A portal for Wikipedia's philosophy resources • 18,160 articles in English

*The Thinker*, a statue by Auguste Rodin, is often used to represent philosophy.

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

Philosophy (from Ancient Greek philosophía, lit. 'love of wisdom') is a systematic study of general and fundamental questions concerning topics like existence, knowledge, mind, reason, language, and value. 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 mathematics, philosophy of science, philosophy of religion, 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. Many scientific academic disciplines have associated philosophical subfields, like philosophy of physics and philosophy of biology, examining their fundamental concepts, methods, assumptions and implications. Philosophy is related to and informs many other fields, such as law, business, and journalism, providing an interdisciplinary perspective and addressing their ethical questions. (Full article...)

Featured articles -

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

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A Vindication of the Rights of Men, in a Letter to the Right Honourable Edmund Burke; Occasioned by His Reflections on the Revolution in France (1790) is a political pamphlet, written by the 18th-century British writer and women's rights advocate Mary Wollstonecraft, which attacks aristocracy and advocates republicanism. Wollstonecraft's was the first response in a pamphlet war sparked by the publication of Edmund Burke's Reflections on the Revolution in France (1790), a defense of constitutional monarchy, aristocracy, and the Church of England.

Wollstonecraft attacked not only hereditary privilege, but also the rhetoric that Burke used to defend it. Most of Burke's detractors deplored what they viewed as his theatrical pity for Marie Antoinette, but Wollstonecraft was unique in her love of Burke's gendered language. By saying the sublime and the beautiful, terms first established by Burke himself in A Philosophical Enquiry into the Origin of Our Ideas of the Sublime and Beautiful (1756), she kept his rhetoric as well as his argument. In her first unabashedly feminist critique, which Wollstonecraft scholar Claudia Johnson describes as unsurpassed in its argumentative force, Wollstonecraft indicts Burke's justification of an equal society founded on the passivity of women. (Full article...)
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Memorial in Nollendorfplatz, Berlin. Text in triangle:
"Struck Dead
Hushed Up
To the homosexual victims of National Socialism"
Text below: "The 'pink triangle' was the sign with which the National Socialists marked homosexuals in the concentration camps in a defamatory way.
From January 1933 almost all homosexual locales in and around Nollendorfplatz were closed by the National Socialists or misused by raids to create 'pink lists' (homosexual files)."
Before 1933, male homosexual acts were illegal in Germany under Paragraph 175 of the German Criminal Code. The law was not consistently enforced, however, and a thriving gay culture existed in major German cities. After the Nazi takeover in 1933, the first homosexual movement's infrastructure of clubs, organizations, and publications was shut down. After the Röhm purge in 1934, persecuting homosexuals became a priority of the Nazi police state. A 1935 revision of Paragraph 175 made it easier to bring criminal charges for homosexual acts, leading to a large increase in arrests and convictions. Persecution peaked in the years prior to World War II and was extended to areas annexed by Germany, including Austria, the Czech lands, and Alsace–Lorraine.

The Nazi regime considered the elimination of all manifestations of homosexuality in Germany one of its goals, claiming it was a Jewish conspiracy to undermine the German people. Men were often arrested after denunciation, police raids, and through information uncovered during interrogations of other homosexuals. Those arrested were presumed guilty, and subjected to harsh interrogation and torture to elicit a confession. Between 1933 and 1945, an estimated 100,000 men were arrested as homosexuals; around 50,000 of these were sentenced by civilian courts, 6,400 to 7,000 by military courts, and an unknown number by special courts. Most of these men served time in regular prisons, and between 5,000 and 6,000 were imprisoned in concentration camps. The death rate of these prisoners has been estimated at 60 percent, a higher rate than those of other prisoner groups. A smaller number of men were sentenced to death or killed at Nazi euthanasia centres. Nazi Germany's persecution of homosexuals is considered to be the most severe episode in a long history of discrimination and violence targeting sexual minorities. (Full article...)
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Du Bois in 1907

William Edward Burghardt Du Bois (/duːˈbɔɪs/ doo-BOYSS; February 23, 1868 – August 27, 1963) was an American sociologist, writer, historian, and Pan-Africanist civil rights activist. Born in Great Barrington, Massachusetts, Du Bois grew up in a relatively tolerant and integrated community. He completed graduate work at Harvard University, where he was the first African American to earn a doctorate. He was a professor at Atlanta University and over the course of his life wrote many books and articles. He spent the last years of his life in Ghana and died in Accra on August 27, 1963.

Du Bois rose to national prominence as a leader of the Niagara Movement, a group of black civil rights activists seeking equal rights. Du Bois and his supporters opposed the Atlanta Compromise. Instead, Du Bois insisted on full civil rights and increased political representation, which he believed would be brought about by the African-American intellectual elite. He referred to this group as the talented tenth, a concept under the umbrella of racial uplift, and believed that African Americans needed the chance for advanced education to develop their leadership. Du Bois was one of the founders of the National Association for the Advancement of Colored People (NAACP) in 1909. Du Bois used his position in the NAACP to respond to racist incidents. (Full article...)
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Title page, 1798

Maria: or, The Wrongs of Woman is Mary Wollstonecraft's unfinished novelistic sequel to her revolutionary political treatise A Vindication of the Rights of Woman (1792). The Wrongs of Woman was published posthumously in 1798 by her husband, William Godwin, and is often considered her most radical feminist work.

Wollstonecraft's philosophical and gothic novel revolves around the story of a woman imprisoned in an insane asylum by her husband. It focuses on the societal rather than the individual "wrongs of woman" and criticizes what Wollstonecraft viewed as the patriarchal institution of marriage in eighteenth-century Britain and the legal system that protected it. However, the heroine's inability to relinquish her romantic fantasies also reveals women's collusion in their oppression through false and damaging sentimentalism. The novel pioneered the celebration of female sexuality and cross-class identification between women. Such themes, coupled with the publication of Godwin's scandalous Memoirs of Wollstonecraft's life, made the novel unpopular at the time it was published. (Full article...)
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Portrait c. 1772

Samuel Johnson (18 September [O.S. 7 September] 1709 – 13 December 1784), often called Dr Johnson, was an English writer and polymath who made lasting contributions as a poet, playwright, essayist, moralist, literary critic, sermonist, biographer, editor, and lexicographer (creator of dictionaries). The work for which he is best known is his 42,733-entry Dictionary of the English Language (1755). For this and other contributions in and to the English language, the Oxford Dictionary of National Biography has called him "arguably the most distinguished man of letters in English history".

Born in Lichfield, Staffordshire, he attended Pembroke College, Oxford, until lack of funds forced him to leave. After working as a teacher, he moved to London and began writing for The Gentleman's Magazine. Early works include the poem London (1738), the biography Life of Mr Richard Savage (1744), the poem The Vanity of Human Wishes (1749) and the play Irene (1749). After nine years' effort, Johnson's A Dictionary of the English Language (1755) appeared and was acclaimed as "one of the greatest single achievements of scholarship". Later works included The History of Rasselas, Prince of Abissinia (1759) and The Plays of William Shakespeare (1765). In 1763, he befriended James Boswell, with whom he travelled to Scotland; Johnson described his travels in A Journey to the Western Islands of Scotland (1775). Near the end of his life, he authored the voluminous and highly influential Lives of the Most Eminent English Poets (1779–1781), a series of biographies and critical appraisals of 52 poets of the 17th and 18th centuries. (Full article...)
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Eric Alfred Havelock (/ˈhævlɒk/; 3 June 1903 – 4 April 1988) was a British classicist who spent most of his life in Canada and the United States. He was a professor at the University of Toronto and was active in the Canadian socialist movement during the 1930s. In the 1960s and 1970s, he served as chair of the classics departments at both Harvard and Yale. Although he was trained in the turn-of-the-20th-century Oxbridge tradition of classical studies, which saw Greek intellectual history as an unbroken chain of related ideas, Havelock broke radically with his own teachers and proposed an entirely new model for understanding the classical world, based on a sharp division between literature of the 6th and 5th centuries BC on the one hand, and that of the 4th on the other.

Much of Havelock's work was devoted to addressing a single thesis: that all of Western thought is informed by a profound shift in the kinds of ideas available to the human mind at the point that Greek philosophy converted from an oral to a literate form. The idea has been controversial in classical studies, and has been rejected outright both by many of Havelock's contemporaries and modern classicists. Havelock and his ideas have nonetheless had far-reaching influence, both in classical studies and other academic areas. He and Walter J. Ong (who was himself strongly influenced by Havelock) essentially founded the field that studies transitions from orality to literacy, and Havelock has been one of the most frequently cited theorists in that field; as an account of communication, his work profoundly affected the media theories of Harold Innis and Marshall McLuhan. Havelock's influence has spread beyond the study of the classical world to that of analogous transitions in other times and places. (Full article...)
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Title page from the first edition of Locke's Some Thoughts Concerning Education (1693)

Some Thoughts Concerning Education is a 1693 treatise on the education of gentlemen written by the English philosopher John Locke. For over a century, it was the most important philosophical work on education in England. It was translated into almost all of the major written European languages during the eighteenth century, and nearly every European writer on education after Locke, including Jean-Jacques Rousseau, acknowledged its influence.

In his Essay Concerning Human Understanding (1690), Locke outlined a new theory of mind, contending that the mind is originally a tabula rasa or "blank slate"; that is, it did not contain any innate ideas at birth. Some Thoughts Concerning Education explains how to educate that mind using three distinct methods: the development of a healthy body; the formation of a virtuous character; and the choice of an appropriate academic curriculum. (Full article...)
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Priestley, painted by James Sharples, c. 1797

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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Mary Wollstonecraft by John Opie (c. 1791)

The lifetime of British writer, philosopher, and feminist Mary Wollstonecraft (1759–1797) encompassed most of the second half of the eighteenth century, a time of great political and social upheaval throughout Europe and America: political reform movements in Britain gained strength, the American colonists successfully rebelled, and the French Revolution erupted. Wollstonecraft experienced only the headiest of these days, not living to see the end of the democratic revolution when Napoleon crowned himself emperor. Although Britain was still revelling in its mid-century imperial conquests and its triumph in the Seven Years' War, it was the French revolution that defined Wollstonecraft's generation. As poet Robert Southey later wrote: "few persons but those who have lived in it can conceive or comprehend what the memory of the French Revolution was, nor what a visionary world seemed to open upon those who were just entering it. Old things seemed passing away, and nothing was dreamt of but the regeneration of the human race."

Part of what made reform possible in Britain in the second half of the eighteenth century was the dramatic increase in publishing; books, periodicals, and pamphlets became much more widely available than they had been just a few decades earlier. This increase in available printed material helped facilitate the rise of the British middle class. Reacting against what they viewed as aristocratic decadence, the new professional middle classes (made prosperous through British manufacturing and trade), offered their own ethical code: reason, meritocracy, self-reliance, religious toleration, free inquiry, free enterprise, and hard work. They set these values against what they perceived as the superstition and unreason of the poor and the prejudices, censorship, and self-indulgence of the rich. They also helped establish what has come to be called the "cult of domesticity", which solidified gender roles for men and women. This new vision of society rested on the writings of Scottish Enlightenment philosophers such as Adam Smith, who had developed a theory of social progress founded on sympathy and sensibility. A partial critique of the rationalist Enlightenment, these theories promoted a combination of reason and feeling that enabled women to enter the public sphere because of their keen moral sense. Wollstonecraft's writings stand at the nexus of all of these changes. Her educational works, such as her children's book Original Stories from Real Life (1788), helped inculcate middle-class values, and her two Vindications, A Vindication of the Rights of Men (1790) and A Vindication of the Rights of Woman (1792), argue for the value of an educated, rational populace, specifically one that includes women. In her two novels, Mary: A Fiction and Maria: or, The Wrongs of Woman, she explores the ramifications of sensibility for women. (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, values, or decisions. 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, emotionally charged issues and deeply entrenched beliefs. Confirmation bias often comes from automatic mental habits. Studies repeatedly find that people tend to test ideas in a one sided way, mainly searching for evidence that supports what they already assume. Research on selective exposure also suggests that people differ in how strongly they defend their attitudes, with some individuals being more resistant to information that goes against their views.

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 despite the different parties being 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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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/; 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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Portrait, c. 1550

John Calvin (/ˈkælvɪn/; Middle French: Jehan Cauvin; French: Jean Calvin [ʒɑ̃ kalvɛ̃]; 10 July 1509 – 27 May 1564) was a French theologian, pastor and reformer in Geneva during the Protestant Reformation. He was the principal figure in the development of the system of Christian theology later called Calvinism, including its doctrines of predestination and of God's absolute sovereignty in the salvation of the human soul from death and eternal damnation. Calvinist doctrines were influenced by and elaborated upon Augustinian and other Christian traditions. Various Reformed Church movements, including Continental Reformed, Congregationalism, Presbyterianism, Waldensians, Baptist Reformed, Calvinist Methodism, and Reformed Anglican Churches, which look to Calvin as the chief expositor of their beliefs, have spread throughout the world.

Calvin was a dedicated polemicist and apologetic writer who generated much controversy. He also exchanged cordial and supportive letters with many reformers, including Philipp Melanchthon and Heinrich Bullinger. In addition to his seminal Institutes of the Christian Religion, Calvin wrote commentaries on most books of the Bible, confessional documents, and various other theological treatises. (Full article...)
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First edition title page

A Vindication of the Rights of Woman: with Strictures on Political and Moral Subjects is a 1792 essay by British philosopher and women's rights advocate Mary Wollstonecraft. It is considered a feminist or, more precisely, proto-feminist piece, and one of the pioneering works in the tradition now known as feminist philosophy.

In this essay, Wollstonecraft refutes those educational and political theorists of the eighteenth century who did not believe women should receive a full education. She argues that women ought to have an education commensurate with their position in society, claiming that women are essential to the nation because they educate its children and because they could be "companions" to their husbands, rather than mere wives. Instead of viewing women as ornaments to society or property to be traded in marriage, Wollstonecraft maintains that they are human beings deserving of the same fundamental rights as men. Wollstonecraft specifically calls for equality between the sexes in particular areas of life, especially moral responsibility and educational access. Uncertainty regarding whether she believed women should have full voting rights or other political rights make it difficult to classify Wollstonecraft definitively as a modern feminist; furthermore, the word feminist did not emerge until decades after her death. (Full article...)
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Sir Bernard Arthur Owen Williams (21 September 1929 – 10 June 2003) was an English 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 sceptical 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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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 or /kɑːnˈdiːd/ kahn-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 Candidus: 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...)

Did you know (auto-generated) -

... that Porphyry describes a moral obligation to extend justice to animals in his 3rd-century treatise on vegetarianism?
... that physics, chemistry, and biology were all part of philosophy before they became separate disciplines?
... that the barracks at the Xifeng concentration camp were named for Confucian tenets such as righteousness and filial piety?
... that Albert Einstein debated the nature of time with the "most famous philosopher" alive in 1922?
... that philosophers discuss whether truth is correspondence between statements and facts, coherence among beliefs, or something else?
... that Bernhard Waldenfels discussed "black holes of everyday life" in a book subtitled Challenges of Phenomenology?
... that diverse fields study the mind, including psychology, neuroscience, cognitive science, and philosophy?
... that Heinrich Nidecker accused Samuel Taylor Coleridge of having committed plagiarism in his philosophical tract Theory of Life?

Selected philosopher of the week

Thomas More (7 February 1478 — 6 July 1535), posthumously known also as Saint Thomas More, was an English lawyer, author, and statesman. During his lifetime he earned a reputation as a leading humanist scholar and occupied many public offices, including that of Lord Chancellor from 1529 to 1532. More coined the word "utopia", a name he gave to an ideal, imaginary island nation whose political system he described in a book published in 1516. He is chiefly remembered for his principled refusal to accept King Henry VIII's claim to be the supreme head of the Church in England, a decision which ended his political career and led to his execution as a traitor.

In 1935, four hundred years after his death, More was canonized in the Catholic Church by Pope Pius XI, and was later declared the patron saint of lawyers and statesmen. He shares his feast day on 22 June in the General Roman Calendar with Saint John Fisher, the only bishop during the English Reformation to maintain his allegiance to the Pope, at the cost of his life. More was added to the Anglican Churches' calendar of saints in 1980.

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Selected article of the week

Moral realism is the view in philosophy that there are objective moral values. Moral realists argue that moral judgments describe moral facts. This combines a cognitivist view about moral judgments (they are truth-evaluable mental states that describe the state of the world), a view about the existence of moral facts (they do in fact exist), and a view about the nature of moral facts (they are objective: independent of our cognizing them, or our stance towards them, etc.). It contrasts with expressivist or non-cognitivist theories of moral judgment, error theories of moral judgments, fictionalist theories of moral judgment and constructivist or relativist theories of the nature of moral facts.

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Good articles -

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

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Rose Street as seen in an original sketch of 1851

The Rose Street Club (sometimes the International Rose Street Club and earlier the Local Rights Association for Rental and Sanitary Reform) was a far-left, anarchist organisation based in what is now Manette Street, London. Originally centred around London's German community, and acting as a meeting point for new immigrants, it became one of the leading radical clubs of Victorian London in the late-nineteenth century. Although its roots went back to the 1840s, it was properly formed in 1877 by members of a German émigré workers' education group, which soon became frequented by London radicals, and within a few years had led to the formation of similar clubs, sometimes in support and sometimes in rivalry. The Rose Street Club provided a platform for the radical speakers and agitators of the day and produced its own paper, Freiheit—which was distributed over Europe, and especially Germany—and pamphlets for other groups and individuals. Although radical, the club initially focused as much on providing a social service to its members as on activism. With the arrival of the anarchist Johann Most in London in the early 1880s, and his increasing influence within the club, it became increasingly aligned with anarchism. (Full article...)
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The Iranian Enlightenment (Persian: روشنگری ایرانی), sometimes called the first generation of intellectual movements in Iran (Persian: نسل اول جنبش های روشنفکری در ایران), brought new ideas into traditional Iranian society from the mid-19th to the early 20th centuries. During the Qajar era, and especially after Iran's defeat in the last Russo-Persian War (1826–1828), cultural exchanges led to the formation of new ideas among the educated class of Iran. The establishment of Dar al-Fonun, the first modern university in Iran and the arrival of foreign professors, caused the thoughts of European thinkers to enter Iran, followed by the first signs of enlightenment and intellectual movements in Iran.

During this period, intellectual groups were formed in secret societies and secret associations. These secret societies included Mirza Malkam Khan's Faramosh Khaneh (based on Masonic lodges), Anjoman-e Okhovat, Society of Humanity and Mokhadarat Vatan Association. These groups spread their ideas by distributing leaflets and newspapers. These secret societies stressed the need to reform the land and administrative system and reduce the role of the clergy in society, as well as to limit the rulers within the framework of the law. (Full article...)
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A diagram demonstrating mutation and selection

Natural selection is the differential survival and reproduction of individuals due to differences in the relative fitness endowed on them by their own particular complement of observable characteristics. It is a key law or mechanism of evolution which changes the heritable traits characteristic of a population or species over generations. Charles Darwin popularised the term "natural selection", contrasting it with artificial selection, which is intentional, whereas natural selection is not.

For Darwin, natural selection was a law or principle which resulted from three different kinds of process: inheritance, including the transmission of heritable material from parent to offspring and its development (ontogeny) in the offspring; variation, which partly resulted from an organism's own agency; and the struggle for existence, which included both competition between organisms and cooperation or 'mutual aid' (particularly in 'social' plants and social animals). (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. 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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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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al-Ma'arri by Kahlil Gibran

Abu al-Ala al-Ma'arri (Arabic: أبو العلاء المعري; December 973 – May 1057), also known by his Latin name Abulola Moarrensis, was an Arab philosopher, poet, and writer from Ma'arrat al-Nu'man, Emirate of Aleppo (in present day Syria). Al-Ma'arri's religious beliefs and philosophical worldview have been the subject of extensive historical and modern academic debate. While his critical poetry led detractors and early Western scholars to characterize him as a deist, freethinker, or one of the "foremost atheists" of his time, this categorization is highly disputed by other scholars and by Al-Ma'arri's own subsequent writings. In his self-defensive treatise Zajr al-Nabeh (The Repelling of the Barker), al-Ma'arri explicitly affirmed his orthodox Islamic faith—including his belief in the Day of Judgment—and sought refuge in God from claims that his poetry was proof of atheism. In these texts, he clarified that his verses were not a rejection of Islam itself, but rather harsh critiques directed at the corruption of religious scholars, hypocritical practices, and the theological ignorance of his contemporaries.

Born in the city of al-Ma'arra (present-day Ma'arrat al-Nu'man, Syria) during the later Abbasid era, he became blind at a young age from smallpox but nonetheless studied in nearby Aleppo, then in Tripoli and Antioch. Producing popular poems in Baghdad, he refused to sell his texts. In 1010, he returned to Syria after his mother began declining in health, and continued writing, which gained him local respect. (Full article...)
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A Jewish woman chased by men and youth during the pogrom

The Lviv pogroms were the consecutive pogroms and massacres of Jews in June and July 1941 in the city of Lwów in German-occupied Eastern Poland/Western Ukraine (now Lviv, Ukraine). The massacres were perpetrated by Ukrainian nationalists (specifically, the OUN), German death squads (Einsatzgruppen), and urban population from 30 June to 2 July, and from 25 to 29 July, during the German invasion of the Soviet Union. Thousands of Jews were killed both in the pogroms and in the Einsatzgruppen killings.

Ukrainian militia as well as Ukrainian residents and to a lower degree Poles targeted Jews in the first pogrom, which was triggered by the discovery of thousands of bodies in three Lviv prisons of victims of the Soviet NKVD prisoner massacres, which were widely blamed on "Jewish Bolsheviks". The subsequent massacres were directed by the Germans in the context of the Holocaust in Eastern Europe. The pogroms have been widely debated in the historiography, including the extent to which Ukrainian nationalists played a central or complicit role. (Full article...)
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In pragmatics, a subdiscipline of linguistics, an implicature is something the speaker suggests or implies with an utterance, even though it is not literally expressed. Implicatures can aid in communicating more efficiently than by explicitly saying everything we want to communicate. The philosopher H. P. Grice coined the term in 1975. Grice distinguished conversational implicatures, which arise because speakers are expected to respect general rules of conversation, and conventional ones, which are tied to certain words such as but or therefore. Take for example the following exchange:

: A (to passerby): I am out of gas.
: B: There is a gas station 'round the corner. (Full article...)
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Clare Palmer (born 1967) is a British philosopher, theologian and scholar of environmental and religious studies. She is known for her work on environmental and animal ethics. She was appointed as a professor in the Department of Philosophy at Texas A&M University in 2010. She had previously held academic appointments at the Universities of Greenwich, Stirling, and Lancaster in the United Kingdom, and Washington University in St. Louis in the United States, among others.

She has published three sole-authored books: Environmental Ethics (ABC-CLIO, 1997), Environmental Ethics and Process Thinking (Oxford University Press, 1998) and Animal Ethics in Context (Columbia University Press, 2010). She has also published two co-authored books and has edited (or co-edited) seven collections or anthologies. She is a former editor of the religious studies journal Worldviews: Environment, Culture, Religion, and a former president of the International Society for Environmental Ethics. (Full article...)
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Pre-Socratic philosophy, also known as early Greek philosophy, is ancient Greek philosophy before Socrates. Pre-Socratic philosophers were mostly interested in cosmology, the beginning and the substance of the universe, but the inquiries of these early philosophers spanned the workings of the natural world as well as human society, ethics, and religion. They sought explanations based on natural law rather than the actions of gods. Their work and writing has been almost entirely lost. Knowledge of their views comes from testimonia, i.e. later authors' discussions of the work of pre-Socratics. Philosophy found fertile ground in the ancient Greek world because of the close ties with neighboring civilizations and the rise of autonomous civil entities, poleis.

Pre-Socratic philosophy began in the 6th century BC with the three Milesians: Thales, Anaximander, and Anaximenes. They all attributed the arche (a word that could take the meaning of "origin", "substance" or "principle") of the world to, respectively, water, apeiron (the unlimited), and air. Another three pre-Socratic philosophers came from nearby Ionian towns: Xenophanes, Heraclitus, and Pythagoras. Xenophanes is known for his critique of the anthropomorphism of gods. Heraclitus, who was notoriously difficult to understand, is known for his maxim on impermanence, ta panta rhei, and for attributing fire to be the arche of the world. Pythagoras created a cult-like following that advocated that the universe was made up of numbers. The Eleatic school (Parmenides, Zeno of Elea, and Melissus) followed in the 5th century BC. Parmenides claimed that only one thing exists and nothing can change. Zeno and Melissus mainly defended Parmenides' opinion. Anaxagoras and Empedocles offered a pluralistic account of how the universe was created. Leucippus and Democritus are known for their atomism, and their views that only void and matter exist. The Sophists advanced philosophical relativism. The Pre-Socratics have had significant impact on several concepts of Western philosophy, such as naturalism and rationalism, and paved the way for scientific methodology. (Full article...)
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Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné, was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming organisms. He is known as the "father of modern taxonomy". Many of his writings were in Latin; his name is rendered in Latin as Carolus Linnæus and, after his 1761 ennoblement, as Carolus a Linné.

Linnaeus was the son of a curate and was born in Råshult, in the countryside of Småland, southern Sweden. He received most of his higher education at Uppsala University and began giving lectures in botany there in 1730. He lived abroad between 1735 and 1738, where he studied and also published the first edition of his Systema Naturae in the Netherlands. He then returned to Sweden where he became professor of medicine and botany at Uppsala. In the 1740s, he was sent on several journeys through Sweden to find and classify plants and animals. In the 1750s and 1760s, he continued to collect and classify animals, plants, and minerals, while publishing several volumes. By the time of his death in 1778, he was one of the most acclaimed scientists in Europe. (Full article...)
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Nishidhi, a 14th-century memorial stone depicting the observance of the vow of Sallekhana with old Kannada inscription. Found at Tavanandi forest, Karnataka, India.

Sallekhana (IAST: sallekhanā), also known as samlehna, santhara, samadhi-marana or sanyasana-marana, is a supplementary vow to the ethical code of conduct of Jainism. It is the religious practice of voluntarily fasting to death by gradually reducing the intake of food and liquids. It is viewed in Jainism as the thinning of human passions and the body, and another means of destroying rebirth-influencing karma by withdrawing all physical and mental activities. It is not considered a suicide by Jain scholars because it is not an act of passion, nor does it employ poisons or weapons. After the sallekhana vow, the ritual preparation and practice can extend into years.
Sallekhana is a vow available to both Jain ascetics and householders. Historic evidence such as nishidhi engravings suggest sallekhana was observed by both men and women, including queens, in Jain history. However, in the modern era, death through sallekhana has been a relatively uncommon event. There is debate about the practice from a right to life vs right to die and a freedom of religion viewpoint. In 2015, the Rajasthan High Court banned the practice, considering it suicide. In 2016, the Supreme Court of India stayed the decision of the Rajasthan High Court and lifted the ban on sallekhana. (Full article...)
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Painting in a Jain temple with the statement "ahiṃsā paramo dharma" (non-injury is the highest virtue/religion)

In Jainism, ahiṃsā (Ahimsā, alternatively spelled 'ahinsā', Sanskrit: अहिंसा IAST: ahiṃsā, Pāli: avihinsā) is a fundamental principle forming the cornerstone of its ethics and doctrine. The term ahiṃsā means nonviolence, non-injury, and the absence of desire to harm any life forms. Veganism, vegetarianism and other nonviolent practices and rituals of Jains flow from the principle of ahimsa. There are five specific transgressions of ahimsa in Jain scriptures – binding of animals, beating, mutilating limbs, overloading, and withholding food and drink. Any other interpretation is subject to individual choices and not authorized by scriptures.

The Jain concept of ahimsa is very different from the concept of nonviolence found in other philosophies. Violence is usually associated with causing harm to others. But according to the Jain philosophy, violence refers primarily to injuring one's own self – behaviour which inhibits the soul's own ability to attain moksha (liberation from the cycle of births and deaths). At the same time it also implies violence to others because it is this tendency to harm others that ultimately harms one's own soul. Furthermore, the Jains extend the concept of ahimsa not only to humans but to all animals, plants, micro-organisms and all beings having life or life potential. All life is sacred and everything has a right to live fearlessly to its maximum potential. Living beings need not fear those who have taken the vow of ahimsa. According to Jainism, protection of life, also known as abhayadānam, is the supreme charity that a person can make. (Full article...)
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Gandhi in 1931

Mohandas Karamchand Gandhi (/ˈɡɑːndi, ˈɡændi/ GA(H)N-dee; 2 October 1869 – 30 January 1948) was an Indian lawyer, anti-colonial nationalist and political ethicist who employed nonviolent resistance to lead the successful campaign for India's independence from British rule, and to later inspire movements for civil rights and freedom across the world. The honorific Mahātmā (Sanskrit: "great-souled", "venerable"), first applied to him in 1914 in South Africa, is now used throughout the world.

Born and raised in a Hindu family in coastal Gujarat, Gandhi was trained in the law at the Inner Temple in London and was called to the bar at the age of 22. After two uncertain years in India, where he was unable to start a successful law practice, Gandhi moved to South Africa in 1893 to represent an Indian merchant in a lawsuit. He went on to live in South Africa for the next 21 years. Here, Gandhi raised a family and first employed nonviolent resistance in a campaign for civil rights. In 1915, aged 45, he returned to India and soon set about organising peasants, farmers, and urban labourers to protest against discrimination and excessive land tax. (Full article...)
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Cochrane in 2013

Alasdair Cochrane (born 31 March 1978) is a British political theorist and ethicist who is currently Professor of Political Theory in the Department of Politics and International Relations at the University of Sheffield. He is known for his work on animal rights from the perspective of political theory, which is the subject of his two books: An Introduction to Animals and Political Theory (2010, Palgrave Macmillan) and Animal Rights Without Liberation (2012, Columbia University Press). His third book, Sentientist Politics, was published by Oxford University Press in 2018. He is a founding member of the Centre for Animals and Social Justice, a UK-based think tank focused on furthering the social and political status of nonhuman animals. He joined the Department at Sheffield in 2012, having previously been a faculty member at the Centre for the Study of Human Rights, London School of Economics. Cochrane is a sentientist. Sentientism is a naturalistic worldview that grants moral consideration to all sentient beings.

Cochrane's work forms part of the political turn in animal ethics—that is, the emergence of academic literature exploring the normative aspects of human/nonhuman animal relationships from a political perspective. He is known for his interest-based account of animal rights, a theory of justice according to which animals have rights based on their possession of normatively-significant interests. The account is a two-tiered one, with individuals' strong interests grounding prima facie rights, and some prima facie rights becoming concrete, or all-things-considered, rights. In this picture, the violation of concrete rights, but not necessarily prima facie rights, represents an injustice. In particular, Cochrane argues that sentient animals' interests against suffering and death ground prima facie rights against the infliction of suffering and death. These prima facie rights convert to concrete rights in, for example, animal agriculture and animal testing, meaning that killing nonhuman animals or making them suffer for these purposes is unjust. (Full article...)

General images -

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

Image 1Portrait of John Locke, by Sir Godfrey Kneller, 1697 (from Western philosophy)
Image 2Valluvar, the Tamil philosopher of the post-Sangam era (from Eastern philosophy)
Image 3Portrait of René Descartes, after Frans Hals, second half of 17th century (from Western philosophy)
Image 4From left to right: Virchand Gandhi, Anagarika Dharmapala, Swami Vivekananda, G. Bonet Maury. Parliament of World Religions, 1893 (from Eastern philosophy)
Image 5Four Greek philosophers: Socrates, Antisthenes, Chrysippos, Epicurus; British Museum (from Ancient Greek philosophy)
Image 6Xiong Shili circa 1960 (from Eastern philosophy)
Image 7William James in 1906 (from Western philosophy)
Image 8Bronze statue of Giordano Bruno by Ettore Ferrari, Campo de' Fiori, Rome (from Western philosophy)
Image 9Friedrich Nietzsche, photograph by Friedrich Hartmann, c. 1875 (from Western philosophy)
Image 10Patricia Churchland, 2005 (from Western philosophy)
Image 11Gottfried Wilhelm Leibniz, 1695 (from Western philosophy)
Image 12Confucius (from Eastern philosophy)
Image 13Abbo of Fleury (from Medieval philosophy)
Image 14The Seven Sages of the Bamboo Grove, embroidery, 1860–1880 (from Eastern philosophy)
Image 15Portrait of David Hume, by Allan Ramsay, 1754 (from Western philosophy)
Image 16The 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 17Aristotle in The School of Athens, by Raphael (from Western philosophy)
Image 18Ionia, source of early Greek philosophy, in western Asia Minor (from Western philosophy)
Image 19Map of Alexander the Great's empire and the route he and Pyrrho of Elis took to India (from Western philosophy)
Image 20Avicenna (from Medieval philosophy)
Image 21Erasmus is Credited as the Prince of the Humanists (from Western philosophy)
Image 22The 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 23Adi Shankara (8th century CE) the main exponent of Advaita Vedānta (from Eastern philosophy)
Image 24Portrait of Immanuel Kant, c. 1790 (from Western philosophy)
Image 25Portrait by Philippe de Champaigne, 17th century (from Medieval philosophy)
Image 26Bertrand Russell (from Western philosophy)
Image 27Pyrrho of Elis, marble head, Roman copy, Archaeological Museum of Corfu (from Western philosophy)
Image 28St. Anselm of Canterbury is credited as the founder of scholasticism. (from Western philosophy)
Image 29Bust of Socrates, Roman copy after a Greek original from the 4th century BC (from Western philosophy)
Image 30Hu Shih and DT Suzuki during his visit to China in 1934 (from Eastern philosophy)
Image 31Gottlob Frege, c. 1905 (from Western philosophy)
Image 32Fukuzawa Yukichi (1862) a key civil rights activist and liberal thinker (from Eastern philosophy)
Image 33Georg Wilhelm Friedrich Hegel, steel engraving, after 1828 (from Western philosophy)
Image 34Saint Augustine of Hippo (from Western philosophy)
Image 35Edmund Husserl, in the 1910s (from Western philosophy)
Image 36Ferdinand de Saussure (from Western philosophy)
Image 37Sigmund Freud by Max Halberstadt, c. 1921 (from Western philosophy)
Image 38Martin Heidegger (from Western philosophy)
Image 39Søren Kierkegaard, sketch by Niels Christian Kierkegaard, c. 1840 (from Western philosophy)

Selected pictures

Image 1The 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 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 3Lady 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 4A statue of peripatetic philosopher and botanist Theophrastus at the Palermo Botanical Gardens.
Image 5The House Builders (Portraits of Sir W.E. & The Hon. Lady Welby-Gregory), an 1880 painting by Frank Dicksee
Image 6Carl 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 7Adam 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 8Jane 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 9Friedrich Schiller (1759–1805) was a German poet, philosopher, physician, historian and playwright.
Image 10Voltairine 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 11Painting of Gottfried Wilhelm Leibniz by Christoph Bernhard Francke, Braunschweig, Herzog Anton Ulrich Museum, 1700.
Image 12Philosophy, 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 13Niels 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 14The 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 15Umberto 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 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?