Portal:Philosophy

The Philosophy Portal

A portal for Wikipedia's philosophy resources • 17,899 articles in English

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 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, such as the natural and social 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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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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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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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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Wollstonecraft c. 1797

Mary Wollstonecraft (/ˈwʊlstənkræft/, also UK: /-krɑːft/; 27 April 1759 – 10 September 1797) was an English writer and philosopher best known for her advocacy of women's rights. Until the late twentieth century, Wollstonecraft's life, which encompassed several unconventional (at the time) personal relationships, received more attention than her writing. Wollstonecraft is regarded as one of the founding feminist philosophers, and feminists often cite both her life and her works as important influences.

During her brief career she wrote novels, treatises, a travel narrative, a history of the French Revolution, a conduct book, and a children's book. Wollstonecraft is best known for A Vindication of the Rights of Woman (1792), in which she argues that women are not naturally inferior to men but appeared to be only because they lack education. She suggests that both men and women should be treated as rational beings and imagines a social order founded on reason. (Full article...)
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In political philosophy, a throffer is a proposal (also called an intervention) that mixes an offer with a threat which will be carried out if the offer is not accepted. The term was first used in print by political philosopher Hillel Steiner; while other writers followed, it has not been universally adopted and it is sometimes considered synonymous with carrot and stick. Though the threatening aspect of a throffer need not be obvious, or even articulated at all, an overt example is: "Kill this man and receive £100; fail to kill him and I'll kill you."

Steiner differentiated offers, threats and throffers based on the preferability of compliance and noncompliance for the subject when compared to the normal course of events that would have come about were no intervention made. Steiner's account was criticised by philosopher Robert Stevens, who instead suggested that what was important in differentiating the kinds of intervention was whether performing or not performing the requested action was more or less preferable than it would have been were no intervention made. Throffers form part of the wider moral and political considerations of coercion, and form part of the question of the possibility of coercive offers. Contrary to received wisdom that only threats can be coercive, throffers lacking explicit threats have been cited as an example of coercive offers, while some writers argue that offers, threats and throffers may all be coercive if certain conditions are met. For others, by contrast, if a throffer is coercive, it is explicitly the threat aspect that makes it so, and not all throffers can be considered coercive. (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.

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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Wallace in 1895

Alfred Russel Wallace (8 January 1823 – 7 November 1913) was an English naturalist, explorer, geographer, anthropologist, biologist and illustrator. He independently conceived the theory of evolution through natural selection; his 1858 paper on the subject was published that year alongside extracts from Charles Darwin's writings on the topic. It spurred Darwin to set aside the "big species book" he was drafting and to quickly write an abstract of it, which was published in 1859 as On the Origin of Species.

Wallace did extensive fieldwork, starting in the Amazon River basin. He then did fieldwork in the Malay Archipelago, where he identified the faunal divide now termed the Wallace Line, which separates the Indonesian archipelago into two distinct parts: a western portion in which the animals are largely of Asian origin, and an eastern portion where the fauna reflect Australasia. He was considered the 19th century's leading expert on the geographical distribution of animal species, and is sometimes called the "father of biogeography", or more specifically of zoogeography. (Full article...)
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Goldman, c. 1911

Emma Goldman (June 27, 1869 – May 14, 1940) was a Russian-born anarchist revolutionary, political activist, and writer. She played a pivotal role in the development of anarchist political philosophy in North America and Europe in the first half of the 20th century.

Born in Kaunas, Lithuania (then within the Russian Empire), to a Lithuanian Jewish family, Goldman immigrated to the United States in 1885. Attracted to anarchism after the Haymarket affair in Chicago, Goldman became a writer and a renowned lecturer on anarchist philosophy, women's rights, and social issues, attracting crowds of thousands. She and anarchist writer Alexander Berkman, her lover and lifelong friend, planned to assassinate industrialist and financier Henry Clay Frick as an act of propaganda of the deed. Frick survived the attempt on his life in 1892, and Berkman was sentenced to 22 years in prison. Goldman was imprisoned several times in the years that followed, for "inciting to riot" and illegally distributing information about birth control. In 1906, Goldman founded the anarchist journal Mother Earth. (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 tireless 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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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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1897 illustration of La Peau de chagrin, drawn by Adrien Moreau and published by George Barrie & Son

La Peau de chagrin (French pronunciation: [la po də ʃaɡʁɛ̃], The Skin of Shagreen), known in English as The Magic Skin and The Wild Ass's Skin, is an 1831 novel by French novelist and playwright Honoré de Balzac (1799–1850). Set in early 19th-century Paris, it tells the story of a young man who finds a magic piece of shagreen (untanned skin from a wild ass) that fulfills his every desire. For each wish granted, however, the skin shrinks and consumes a portion of his physical energy. La Peau de chagrin belongs to the Études philosophiques group of Balzac's sequence of novels, La Comédie humaine.

Before the book was completed, Balzac created excitement about it by publishing a series of articles and story fragments in several Parisian journals. Although he was five months late in delivering the manuscript, he succeeded in generating sufficient interest that the novel sold out instantly upon its publication. A second edition, which included a series of twelve other "philosophical tales", was released one month later. (Full article...)
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Lenin in 1920

Vladimir Ilyich Ulyanov (22 April [O.S. 10 April] 1870 – 21 January 1924), better known as Vladimir Lenin, was a Russian revolutionary, politician and political theorist. He was the first head of government of Soviet Russia from 1917 until his death in 1924 and of the Soviet Union from 1922 until his death. As the Bolsheviks' founder, Lenin led the October Revolution, which established the world's first communist state. His government won the Russian Civil War and created a one-party state under the Communist Party. Ideologically a Marxist, his developments to the ideology are called Leninism.

Lenin embraced revolutionary socialist politics after his brother was executed in 1887 for plotting to assassinate Tsar Alexander III. He was expelled from Kazan Imperial University for participating in student protests, and earned a law degree before moving to Saint Petersburg in 1893 and becoming a prominent Marxist activist. In 1897, Lenin was exiled to Siberia for three years, after which he moved to Western Europe, including Switzerland, and became a leading figure in the Russian Social Democratic Labour Party. In 1903, the party split between Lenin's Bolshevik faction and the Mensheviks, with Lenin advocating for a vanguard party to lead the proletariat in establishing socialism. Lenin briefly returned to Russia during the Revolution of 1905. During the First World War, he campaigned for its transformation into a Europe-wide proletarian revolution. After the February Revolution of 1917 ousted Tsar Nicholas II, Lenin returned to Russia and played a leading role in the October Revolution. (Full article...)
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Hand in c. 1910

Billings Learned Hand (/ˈlɜːrnɪd/ LURN-id; January 27, 1872 – August 18, 1961) was an American jurist, lawyer, and judicial philosopher. He served as a federal trial judge on the U.S. District Court for the Southern District of New York from 1909 to 1924 and as a federal appellate judge on the U.S. Court of Appeals for the Second Circuit from 1924 to 1961.

Born and raised in Albany, New York, Hand majored in philosophy at Harvard College and graduated with honors from Harvard Law School. After a relatively undistinguished career as a lawyer in Albany and New York City, he was appointed at the age of 37 as a Manhattan federal district judge in 1909. The profession suited his detached and open-minded temperament, and his decisions soon won him a reputation for craftsmanship and authority. Between 1909 and 1914, under the influence of Herbert Croly's social theories, Hand supported New Nationalism. He ran unsuccessfully as the Progressive Party's candidate for chief judge of the New York Court of Appeals in 1913, but withdrew from active politics shortly afterwards. In 1924, President Calvin Coolidge elevated Hand to the Court of Appeals for the Second Circuit, which he went on to lead as the senior circuit judge (later retitled chief judge) from 1939 until his semi-retirement in 1951. Scholars have recognized the Second Circuit under Hand as one of the finest appeals courts in American history. Friends and admirers often lobbied for Hand's promotion to the Supreme Court, but circumstances and his political past conspired against his appointment. (Full article...)
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Title page from the first English edition of Part I

The Age of Reason; Being an Investigation of True and Fabulous Theology is a work by English and American political activist Thomas Paine, arguing for the philosophical position of deism. It follows in the tradition of 18th-century British deism, and challenges institutionalized religion and the legitimacy of the Bible. It was published in three parts in 1794, 1795, and 1807.

It was a best-seller in the United States, where it caused a deistic revival. British audiences, fearing increased political radicalism as a result of the French Revolution, received it with more hostility. The Age of Reason presents common deistic arguments; for example, it highlights what Paine saw as corruption of the Christian Church and criticizes its efforts to acquire political power. Paine advocates reason in the place of revelation, leading him to reject miracles and to view the Bible as an ordinary piece of literature, rather than a divinely-inspired text. In The Age of Reason, he promotes natural religion and argues for the existence of a creator god. (Full article...)
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Portrait, c. 1910, after 1620 original

Johannes Kepler (27 December 1571 – 15 November 1630) was a German polymath who was an astronomer, mathematician, astrologer, natural philosopher and music theorist. He is a key figure in the 17th-century Scientific Revolution, best known for his laws of planetary motion, and his books Astronomia nova, Harmonice Mundi, and Epitome Astronomiae Copernicanae. The variety and impact of his work made Kepler one of the founders and fathers of modern astronomy, the scientific method, natural science, and modern science. He has been described as the "father of science fiction" for his novel Somnium.

Kepler was a mathematics teacher at a seminary school in Graz, where he became an associate of Prince Hans Ulrich von Eggenberg. Later he became an assistant to the astronomer Tycho Brahe in Prague, and eventually the imperial mathematician to Emperor Rudolf II and his two successors Matthias and Ferdinand II. He also taught mathematics in Linz, and was an adviser to General Wallenstein. (Full article...)

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... that in his book How to Be Perfect, Michael Schur sought to "wade into some deeply confusing and painful applications of moral philosophy ... but in a fun way"?
... 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?
... that the barracks at the Xifeng concentration camp were named for Confucian tenets such as righteousness and filial piety?
... that mathematician Grete Hermann wrote political philosophy articles for Der Funke and Sozialistische Warte under various pseudonyms during the German resistance to Nazism?
... 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 diverse fields study the mind, including psychology, neuroscience, cognitive science, and philosophy?
... that the story of the philosopher Heraclitus dying while covered in dung may have been a parody of his beliefs?

Selected philosopher of the week

Willard Van Orman Quine (1908–2000) was an analytic philosopher who became a main proponent of the view that philosophy is not conceptual analysis. His paper "Two Dogmas of Empiricism" attacked two central aspects of logical positivism by blurring the line in the analytic-synthetic distinction and by rejecting reductionism. He propounded the indeterminacy of translation thesis through ontological relativity, a holist view that all theories are under-determined by empirical data. Quine also made contributions to logic, particularly set theory. He popularized the phrases "hold come what may" and "hold more stubbornly at least."

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Selected article of the week

Phenomenology is a current in philosophy that takes the intuitive experience of phenomena (what presents itself to us in conscious experience) as its starting point and tries to extract from it the essential features of experiences and the essence of what we experience. It stems from the School of Brentano and was mostly based on the work of the 20th century philosopher Edmund Husserl, and was developed further by philosophers such as Martin Heidegger, Maurice Merleau-Ponty, Max Scheler, Hannah Arendt, and Emmanuel Levinas. As such, phenomenological thought influenced the development of existential phenomenology and existentialism in France, as is clear from the work of Jean-Paul Sartre and Simone de Beauvoir, and Munich phenomenology (Johannes Daubert, Adolf Reinach in Germany and Alfred Schütz in Austria).

While the term "phenomenology" was used several times in the history of philosophy before Husserl, modern use ties it more explicitly to his particular method.

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Effigy from Peckham's tomb in Canterbury Cathedral

John Peckham (c. 1230 – 8 December 1292) was a Franciscan friar and Archbishop of Canterbury in the years 1279–1292.

Peckham studied at the University of Paris under Bonaventure, where he later taught theology and became known as a conservative opponent of Thomas Aquinas, especially regarding the nature of the soul. Peckham also studied optics and astronomy - his studies in those subjects were particularly influenced by Roger Bacon and Alhazen. Around 1270, Peckham returned to England, where he taught at the University of Oxford, and was elected the Franciscans' provincial minister of England in 1275. After a brief stint in Rome, he was appointed Archbishop of Canterbury in 1279. His time as archbishop was marked by efforts to improve discipline in the clergy as well as reorganize the estates of his see. He served King Edward I of England in Wales. (Full article...)
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Marcus Aurelius Antoninus (/ɔːˈriːliəs/ or-EE-lee-əs; Latin: [ˈmaːrkʊs au̯ˈreːli.us antoːˈniːnʊs]; 26 April 121 – 17 March 180) was Roman emperor from 161 to 180 and a Stoic philosopher. He was a member of the Nerva–Antonine dynasty, the last of the rulers later known as the Five Good Emperors and the last emperor of the Pax Romana, an age of relative peace, calm, and stability for the Roman Empire lasting from 27 BC to 180 AD. He served as Roman consul in 140, 145, and 161.

Marcus Aurelius was the son of the praetor Marcus Annius Verus and his wife Domitia Calvilla. He was related through marriage to the emperors Trajan and Hadrian. Marcus was three when his father died, and was raised by his mother and paternal grandfather. After Hadrian's adoptive son, Aelius Caesar, died in 138, Hadrian adopted Marcus's uncle Antoninus Pius as his new heir. In turn, Antoninus adopted Marcus and Lucius, the son of Aelius. Hadrian died that year, and Antoninus became emperor. Now heir to the throne, Marcus studied Greek and Latin under tutors such as Herodes Atticus and Marcus Cornelius Fronto. He married Antoninus's daughter Faustina in 145. (Full article...)
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Maitreyi (fl. 8th century BCE) was an Indian philosopher who lived during the later Vedic period in ancient India. She is mentioned in the Brihadaranyaka Upanishad as one of two wives of the Vedic sage Yajnavalkya. In the Hindu epic Mahabharata and the Gṛhyasūtras, however, Maitreyi is described as an Advaita philosopher who never married. In ancient Sanskrit literature, she is known as a brahmavadini (an expounder of the Veda).

Maitreyi appears in ancient Indian texts, such as in a dialogue where she explores the Hindu concept of Atman (soul or self) in a dialogue with Yajnavalkya in the Brihadaranyaka Upanishad. According to this dialogue, love is driven by a person's soul, and Maitreyi discusses the nature of Atman and Brahman and their unity, the core of Advaita philosophy. This Maitreyi-Yajnavalkya dialogue is the topic of Sureshvara's varttika, a commentary. (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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Bust of Pythagoras of Samos in the
Capitoline Museums, Rome

Pythagoras of Samos (Ancient Greek: Πυθαγόρας; c. 570 – c. 495 BC) was an ancient Ionian Greek philosopher, polymath, and the eponymous founder of Pythagoreanism. His political and religious teachings were well known in Magna Graecia and influenced the philosophies of Plato, Aristotle, and, through them, Western philosophy. Modern scholars disagree regarding Pythagoras's education and influences, but most agree that he travelled to Croton in southern Italy around 530 BC, where he founded a school in which initiates were allegedly sworn to secrecy and lived a communal, ascetic lifestyle.

In antiquity, Pythagoras was credited with mathematical and scientific discoveries, such as the Pythagorean theorem, Pythagorean tuning, the five regular solids, the theory of proportions, the sphericity of the Earth, the identity of the morning and evening stars as the planet Venus, and the division of the globe into five climatic zones. He was reputedly the first man to call himself a philosopher ("lover of wisdom"). Historians debate whether Pythagoras made these discoveries and pronouncements, as some of the accomplishments credited to him likely originated earlier or were made by his colleagues or successors, such as Hippasus and Philolaus. (Full article...)
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Cries and Whispers (Swedish: Viskningar och rop, lit. 'Whispers and cries') is a 1972 Swedish tragedy film written and directed by Ingmar Bergman and starring Harriet Andersson, Kari Sylwan, Ingrid Thulin and Liv Ullmann. The film, set in a mansion at the end of the 19th century, is about three sisters and a servant who struggle with the terminal cancer of one of the sisters (Andersson). The servant (Sylwan) is close to her, while the other two sisters (Ullmann and Thulin) confront their emotional distance from each other.

Inspired by Bergman's mother, Karin Åkerblom, and his vision of four women in a red room, Cries and Whispers was filmed at Taxinge-Näsby Castle in 1971. Its themes include faith, the female psyche and the search for meaning in suffering, and academics have found Biblical allusions. Unlike previous Bergman films, it uses saturated colour, crimson in particular. (Full article...)
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Cover of the first edition

A Voyage to Arcturus is a novel by the Scottish writer David Lindsay, first published in 1920. An interstellar voyage is the framework for a narrative of a journey through fantastic landscapes. The story is set on Tormance, an imaginary planet orbiting the star Arcturus. The lands through which the characters travel represent philosophical systems or states of mind as the main character, Maskull, searches for the meaning of reality. The book combines fantasy, philosophy, and science fiction in an exploration of the nature of good and evil and their relationship with existence. Described by critic, novelist, and philosopher Colin Wilson as the "greatest novel of the twentieth century", it was a central influence on C. S. Lewis' Space Trilogy, and through him on J. R. R. Tolkien, who said he read the book "with avidity". Clive Barker called it "a masterpiece" and "an extraordinary work ... quite magnificent".

The book sold poorly during Lindsay's lifetime, but was republished in 1946 and many times thereafter. It has been translated into at least six languages. Critics such as the novelist Michael Moorcock have noted that the book is unusual, but that it has been highly influential with its qualities of "commitment to the Absolute" and "God-questioning genius". (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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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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John Hadley (born 27 September 1966) is an Australian philosopher whose research concerns moral and political philosophy, including animal ethics, environmental ethics, and metaethics. He spent much of his career at Western Sydney University, where he was a senior lecturer in philosophy, but also taught at Charles Sturt University and the University of Sydney, where he studied as an undergraduate and doctoral candidate. In addition to a variety of articles in peer-reviewed journals and edited collections, he is the author of the 2015 monograph Animal Property Rights (Lexington Books) and the 2019 monograph Animal Neopragmatism (Palgrave Macmillan). He is also the co-editor, with Elisa Aaltola, of the 2015 collection Animal Ethics and Philosophy (Rowman & Littlefield International).

Hadley is known for his account of animal property rights theory. He proposes that wild animals be offered property rights over their territories, and that guardians be appointed to represent their interests in decision-making procedures. He suggests that this account could be justified directly, on the basis of the interests of the animals concerned, or indirectly, so that natural environments are protected. The theory has received discussion in popular and academic contexts, with critical responses from farming groups and mixed responses from moral and political theorists. (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 an unknown Cynic philosopher from the Capitoline Museums in Rome. This statue is a Roman-era copy of an earlier Greek statue from the third century BC. The scroll in his right hand is an 18th-century restoration.

Cynicism (Ancient Greek: κυνισμός) is a school of thought in ancient Greek philosophy, originating in the Classical period and extending into the Hellenistic and Roman Imperial periods. According to Cynicism, people are reasoning animals, and the purpose of life and the way to gain happiness is to achieve virtue, in agreement with nature, following one's natural sense of reason by living simply and shamelessly free from social constraints. The Cynics (Ancient Greek: Κυνικοί, Latin: Cynici) rejected all conventional desires for wealth, power, glory, social recognition, conformity, and worldly possessions and even flouted such conventions openly and derisively in public.

The first philosopher to outline these themes was Antisthenes, who had been a pupil of Socrates in the late 400s BC. He was followed by Diogenes, who lived in a ceramic jar on the streets of Athens. Diogenes took Cynicism to its logical extremes with his famous public demonstrations of non-conformity, coming to be seen as the archetypal Cynic philosopher. He was followed by Crates of Thebes, who gave away a large fortune so he could live a life of Cynic poverty in Athens. (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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Marcus Tullius Cicero, the author of the Consolatio

Consolatio (Latin: [koːnsoːˈlaːtɪ.oː]; Consolation) is a lost philosophical work written by Marcus Tullius Cicero in the year 45 BC. The work had been written to soothe his grief after the death of his daughter, Tullia, which had occurred in February of the same year. Not much is known about the work, although it seems to have been inspired by the Greek philosopher Crantor's ancient work De Luctu ("On Grief"), and its structure was probably similar to a series of letter correspondences between Servius Sulpicius Rufus and Cicero.

Fragments of the work survive, having been quoted by Lactantius, and Jerome makes note of the work in a consolatory letter to Heliodorus of Altino. A popular piece of writing until its loss, the Consolatio is widely accepted as the distinct work that transmitted the earlier consolatio literary tradition to the Romans of the late Republic. In 1583, Italian scholar Carlo Sigonio claimed to have discovered a non-fragmentary version of the Consolatio, although most scholars now agree that this work was a fake, with modern stylometric methods backing this up. This Renaissance work, now known as the pseudo-Ciceronian Consolatio, does survive. (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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General images - load new batch

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

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

Selected pictures

Image 1Umberto 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 2Friedrich Schiller (1759–1805) was a German poet, philosopher, physician, historian and playwright.
Image 3Adam 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 4Oscar 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 5Niels 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 6Leo Tolstoy in 1897. Count Lev Nikolayevich Tolstoy was a Russian writer who is regarded as one of the greatest authors of all time.
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 8Voltairine 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 9Painting of Gottfried Wilhelm Leibniz by Christoph Bernhard Francke, Braunschweig, Herzog Anton Ulrich Museum, 1700.
Image 10The House Builders (Portraits of Sir W.E. & The Hon. Lady Welby-Gregory), an 1880 painting by Frank Dicksee
Image 11Jane 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 12Plato (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.
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 14Lady 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 15A statue of peripatetic philosopher and botanist Theophrastus at the Palermo Botanical Gardens.
Image 16Philosophy, 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 17Carl 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".

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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?

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