Portal:Philosophy

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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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Benedictus de Spinoza was a Jewish-Dutch philosopher. He is considered one of the great rationalists of 17th-century philosophy and, by virtue of his magnum opus the Ethics, one of the definitive ethicists. His writings, like those of his fellow rationalists, reveal considerable mathematical training and facility. Spinoza was a lens crafter by trade, an exciting engineering field at the time because of great discoveries being made by telescopes. The full impact of his work only took effect some time after his death and after the publication of his Opera Posthuma. He is now seen as having prepared the way for the 18th century Enlightenment, and as a founder of modern biblical criticism. 20th century philosopher Gilles Deleuze referred to Spinoza as "The absolute philosopher, whose Ethics is the foremost book on concepts" (Deleuze, 1990).

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The felicific calculus was an algorithm formulated by Jeremy Bentham for calculating the degree or amount of happiness that a specific action is likely to cause, and hence its degree of moral rightness. It is also known as the "Utility Calculus", the "Hedonistic Calculus" and the "Hedonic Calculus".

The calculus was proposed by Bentham as part of his project of making morals amenable to scientific treatment. Since classical utilitarians considered that the rightness of an action was a function of the goodness of its consequences, and that the goodness of a state of affairs was itself a function of the happiness it contained, the felicific calculus could, in principle at least, establish the moral status of any considered act.

Some critics argue that the happiness of different people is incommensurable, and thus a felicific calculus is impossible in practice...

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  • Marcellina was an early Christian Carpocratian religious leader in the mid-second century AD known primarily from the writings of Irenaeus and Origen. She originated in Alexandria, but moved to Rome during the episcopate of Anicetus (c. 157 – 168). She attracted large numbers of followers and founded the Carpocratian sect of Marcellians. Like other Carpocratians, Marcellina and her followers believed in antinomianism, also known as libertinism, the idea that obedience to laws and regulations is unnecessary in order to attain salvation. They believed that Jesus was only a man, but saw him as a model to be emulated, albeit one which a believer was capable of surpassing. Marcellina's community appears to have sought to literally implement the foundational Carpocratian teaching of social egalitarianism. The Marcellians in particular are reported to have branded their disciples on the insides of their right earlobes and venerated images of Jesus as well as Greek philosophers such as Pythagoras, Plato, and Aristotle. Although the Marcellians identified themselves as "gnostics", many modern scholars do not classify them as members of the sect of Gnosticism. (Full article...)


  • The five precepts (Sanskrit: pañcaśīla; Pali: pañcasīla) or five rules of training (Sanskrit: pañcaśikṣapada; Pali: pañcasikkhapada) is the most important system of morality for Buddhist lay people. They constitute the basic code of ethics to be respected by lay followers of Buddhism. The precepts are commitments to abstain from killing living beings, stealing, sexual misconduct, lying and intoxication. Within the Buddhist doctrine, they are meant to develop mind and character to make progress on the path to enlightenment. They are sometimes referred to as the Śrāvakayāna precepts in the Mahāyāna tradition, contrasting them with the bodhisattva precepts. The five precepts form the basis of several parts of Buddhist doctrine, both lay and monastic. With regard to their fundamental role in Buddhist ethics, they have been compared with the Ten Commandments in Abrahamic religions or the ethical codes of Confucianism. The precepts have been connected with utilitarianist, deontological and virtue approaches to ethics, though by 2017, such categorization by western terminology had mostly been abandoned by scholars. The precepts have been compared with human rights because of their universal nature, and some scholars argue they can complement the concept of human rights.

    The five precepts were common to the religious milieu of 6th-century BCE India, but the Buddha's focus on awareness through the fifth precept was unique. As shown in Early Buddhist Texts, the precepts grew to be more important, and finally became a condition for membership of the Buddhist religion. When Buddhism spread to different places and people, the role of the precepts began to vary. In countries where Buddhism had to compete with other religions, such as China, the ritual of undertaking the five precepts developed into an initiation ceremony to become a Buddhist layperson. On the other hand, in countries with little competition from other religions, such as Thailand, the ceremony has had little relation to the rite of becoming Buddhist, as many people are presumed Buddhist from birth. (Full article...)

  • Stuckism (/ˈstʌkɪzəm/) is an international art movement founded in 1999 by Billy Childish and Charles Thomson to promote figurative painting as opposed to conceptual art. By May 2017, the initial group of 13 British artists had expanded to 236 groups in 52 countries.

    Childish and Thomson have issued several manifestos. The first one was The Stuckists, consisting of 20 points starting with "Stuckism is a quest for authenticity". Remodernism, the other well-known manifesto of the movement, opposes the deconstruction and irony of postmodernism in favor of what Stuckists refer to as the "spirituality" of the artist. In another manifesto they define themselves as anti-anti-art which is against anti-art and for what they consider conventional art. (Full article...)
  • 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...)

  • Portrayal of Origen from Les Vrais Portraits Et Vies Des Hommes Illustres by André Thévet, c. 1584

    Origen of Alexandria (c. 185 – c. 253), also known as Origen Adamantius, was an early Christian scholar, ascetic, and theologian who was born and spent the first half of his career in Alexandria. He was a prolific writer who wrote roughly 2,000 treatises in multiple branches of theology, including textual criticism, biblical exegesis and hermeneutics, homiletics, and spirituality. He was one of the most influential and controversial figures in early Christian theology, apologetics, and asceticism. He has been described by John Anthony McGuckin as "the greatest genius the early church ever produced".

    Origen founded the Christian School of Caesarea, where he taught logic, cosmology, natural history, and theology, and became regarded by the churches of Palestine and Arabia as the ultimate authority on all matters of theology. He was tortured for his faith during the Decian persecution in 250 and died three to four years later from his injuries. (Full article...)

  • The myth of the clean Wehrmacht (German: Mythos der sauberen Wehrmacht) is the negationist notion that the regular German armed forces (the Wehrmacht) were not involved in the Holocaust or other war crimes during World War II. The myth, heavily promoted by West German authors and military personnel after World War II, denies the culpability of the German military command in the planning and perpetration of war crimes. Even where war crimes and the waging of an extermination campaign, particularly in the Soviet Union – the populace of which was viewed by the Nazis as "sub-humans" ruled by "Jewish Bolshevik" conspirators – have been acknowledged, they are ascribed to the "Party soldiers corps", the Schutzstaffel (SS), but not the regular German military.

    The myth began during the war, being promoted in the Wehrmacht's official propaganda and by soldiers of all ranks seeking to portray their institution in the best possible light; as prospects for victory faded, these soldiers began to portray themselves as victims. After Germany's defeat, the verdict of the International Military Tribunal (1945–1946) was misrepresented as exonerating the Wehrmacht. Franz Halder and other Wehrmacht leaders signed the Generals' memorandum entitled "The German Army from 1920 to 1945", which laid out the key elements of the myth, attempting to exculpate the Wehrmacht from war crimes. (Full article...)

  • Painting of Adi Shankara, exponent of Advaita Vedanta with his disciples by Raja Ravi Varma

    Adi Shankara (8th c. CE), also called Adi Shankaracharya (Sanskrit: आदि शङ्कर, आदि शङ्कराचार्य, romanized: Ādi Śaṅkara, Ādi Śaṅkarācārya, lit. 'First Shankaracharya', pronounced [aːd̪i ɕɐŋkɐraːt͡ɕaːrjɐ]), was an Indian Vedic scholar-monk, philosopher, and teacher (acharya) of Advaita Vedanta. While in recent times he is often revered as the most important Indian philosopher, reliable information on Shankara's actual life is scant, and the historical influence of his works on Hindu intellectual thought has been questioned. The historical Shankara was probably relatively unknown and Vaishnava-oriented and his true impact lies in the popular perception of him as a heroic religious leader who re-established traditional Hinduism.

    Until the 10th century Shankara was overshadowed by his older contemporary Maṇḍana Miśra, and there is no mention of him in concurrent Hindu, Buddhist or Jain sources until the 11th century. The legendary Shankara was created in the 14th century, centuries after his death, when Sringeri matha (Sanskrit: मठ)(maṭha) (monasteries) started to receive patronage from the emperors of the Vijayanagara Empire and shifted their allegiance from Advaitic Agamic Shaivism (Śaivism) to Brahmanical Advaita orthodoxy. Hagiographies dating from the 14th-17th centuries deified him as a ruler-renunciate, travelling on a digvijaya (conquest of the four quarters) across the Indian subcontinent to propagate his philosophy, defeating his opponents in theological debates. These hagiographies also portray him as founding four mathas. Adi Shankara also came to be regarded as the organiser of the Dashanami monastic order, and the unifier of the Shanmata tradition of worship. The title of Shankaracharya, used by heads of certain monasteries in India, is derived from his name. Tradition also portrays him as the one who reconciled the various sects (Vaishnavism, Shaivism, and Shaktism) with the introduction of the Panchayatna (Pañcāyatana) form of worship, the simultaneous worship of five deities – Ganesha, Surya, Vishnu, Shiva, and Devi, arguing that all deities were but different forms of the one Brahman, the invisible Supreme Being. (Full article...)
  • 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...)


  • 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...)

  • King in 1964

    Martin Luther King Jr. (born Michael King Jr.; January 15, 1929 – April 4, 1968) was an American civil rights activist and Baptist minister who was a prominent leader of the civil rights movement from 1955 until his assassination in 1968. He advanced civil rights for people of color in the United States through the use of nonviolent resistance and civil disobedience against Jim Crow laws and other forms of legalized discrimination, which most commonly affected African Americans.

    A Black church leader, King participated in and led marches for the right to vote, desegregation, labor rights, and other civil rights. He oversaw the 1955 Montgomery bus boycott and was the first president of the Southern Christian Leadership Conference (SCLC), leading the unsuccessful Albany Movement in Albany, Georgia, and helping organize nonviolent 1963 protests in Birmingham, Alabama. King was one of the leaders of the 1963 March on Washington, where he delivered his "I Have a Dream" speech, and helped organize two of the three Selma to Montgomery marches during the 1965 Selma voting rights movement. There were dramatic standoffs with segregationist authorities, who often responded violently. The civil rights movement achieved pivotal legislative gains in the Civil Rights Act of 1964, the Voting Rights Act of 1965, and the Fair Housing Act of 1968. (Full article...)
  • 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...)

  • Header of the first Russian edition, published August 11, 1917

    Golos Truda (Russian: Голос Труда, lit. 'The Voice of Labour') was a Russian-language anarchist newspaper. Founded by working-class Russian expatriates in New York City in 1911, Golos Truda shifted to Petrograd during the Russian Revolution in 1917, when its editors took advantage of the general amnesty and right of return for political dissidents. There, the paper integrated itself into the anarchist labour movement, pronounced the necessity of a social revolution of and by the workers, and situated itself in opposition to the myriad of other left-wing movements.

    The rise to power of the Bolsheviks marked the turning point for the newspaper however, as the new government enacted increasingly repressive measures against the publication of dissident literature and against anarchist agitation in general, and after a few years of low-profile publishing, the Golos Truda collective was finally expunged by the Stalinist regime in 1929. (Full article...)

  • Filial piety has been an important aspect of Buddhist ethics since early Buddhism, and was essential in the apologetics and texts of Chinese Buddhism. In the Early Buddhist Texts such as the Nikāyas and Āgamas, filial piety is prescribed and practiced in three ways: to repay the gratitude toward one's parents; as a good karma or merit; and as a way to contribute to and sustain the social order. In Buddhist scriptures, narratives are given of the Buddha and his disciples practicing filial piety toward their parents, based on the qualities of gratitude and reciprocity. Initially, scholars of Buddhism like Kenneth Ch'en saw Buddhist teachings on filial piety as a distinct feature of Chinese Buddhism. Later scholarship, led by people such as John Strong and Gregory Schopen, has come to believe that filial piety was part of Buddhist doctrine since early times. Strong and Schopen have provided epigraphical and textual evidence to show that early Buddhist laypeople, monks and nuns often displayed strong devotion to their parents, concluding that filial piety was already an important part of the devotional life of early Buddhists.

    When Buddhism was introduced in China, it had no organized celibacy. Confucianism emphasized filial piety to parents and loyalty to the emperor, and Buddhist monastic life was seen to go against its tenets. In the 3rd–5th century, as criticism of Buddhism increased, Buddhist monastics and lay authors responded by writing about and translating Buddhist doctrines and narratives that supported filiality, comparing them to Confucianism and thereby defending Buddhism and its value in society. The Mouzi Lihuolun referred to Confucian and Daoist classics, as well as historical precedents to respond to critics of Buddhism. The Mouzi stated that while on the surface the Buddhist monk seems to reject and abandon his parents, he is actually aiding his parents as well as himself on the path towards enlightenment. Sun Chuo (c.300–380) further argued that monks were working to ensure the salvation of all people and making their family proud by doing so, and Liu Xie stated that Buddhists practiced filial piety by sharing merit with their departed relatives. Buddhist monks were also criticized for not expressing their respect to the Chinese emperor by prostrating and other devotion, which in Confucianism was associated with the virtue of filial piety. Huiyuan (334–416) responded that although monks did not express such piety, they did pay homage in heart and mind; moreover, their teaching of morality and virtue to the public helped support imperial rule. (Full article...)
  • Hortensius (Latin: [hɔrˈtẽːsi.ʊs]) or On Philosophy is a lost dialogue written by Marcus Tullius Cicero in the year 45 BC. The dialogue—which is named after Cicero's friendly rival and associate, the speaker and politician Quintus Hortensius Hortalus—took the form of a protreptic. In the work, Cicero, Hortensius, Quintus Lutatius Catulus, and Lucius Licinius Lucullus discuss the best use of one's leisure time. At the conclusion of the work, Cicero argues that the pursuit of philosophy is the most important endeavor.

    While the dialogue was extremely popular in Classical Antiquity, the dialogue only survived into the sixth century AD before it was lost. Today, it is extant in the fragments preserved by the prose writer Martianus Capella, the grammarians Maurus Servius Honoratus and Nonius Marcellus, the early Christian author Lactantius, and the Church Father Augustine of Hippo (the latter of whom explicitly credits the Hortensius with encouraging him to study the tenets of philosophy). (Full article...)
  • Accounting ethics is primarily a field of applied ethics and is part of business ethics and human ethics, the study of moral values and judgments as they apply to accountancy. It is an example of professional ethics. Accounting was introduced by Luca Pacioli, and later expanded by government groups, professional organizations, and independent companies. Ethics are taught in accounting courses at higher education institutions as well as by companies training accountants and auditors.

    Due to the wide range of accounting services and recent corporate collapses, attention has been drawn to ethical standards accepted within the accounting profession. These collapses have resulted in a widespread disregard for the reputation of the accounting profession. To combat the criticism and prevent fraudulent accounting, various accounting organizations and governments have developed regulations and remedies for improved ethics among the accounting profession. (Full article...)

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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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