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Portal:Philosophy

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The Philosophy Portal

Aportal for Wikipedia's philosophy resources • 17,806 articles inEnglish
The Thinker, a statue byAuguste Rodin, is often used to represent philosophy.

Philosophy (fromAncient Greekphilosophíalit.'love of wisdom') is a systematic study of general and fundamental questions concerning topics likeexistence,knowledge,mind,reason,language, andvalue. It is a rational and critical inquiry that reflects on its methods and assumptions.

Historically, many of the individualsciences, such asphysics andpsychology, formed part of philosophy. However, they are considered separate academic disciplines in the modern sense of the term. Influential traditions in thehistory of philosophy includeWestern,Arabic–Persian,Indian, andChinese philosophy. Western philosophy originated inAncient Greece and covers a wide area of philosophical subfields. A central topic in Arabic–Persian philosophy is the relation between reason andrevelation. Indian philosophy combines thespiritual problem of how to reachenlightenment 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, andself-cultivation.

Major branches of philosophy areepistemology,ethics,logic, andmetaphysics. Epistemology studies what knowledge is and how to acquire it. Ethics investigates moral principles and what constitutes right conduct. Logic is the study ofcorrect reasoning and explores how goodarguments can be distinguished from bad ones. Metaphysics examines the most general features ofreality, existence,objects, andproperties. Other subfields areaesthetics,philosophy of language,philosophy of mind,philosophy of religion,philosophy of science,philosophy of mathematics,philosophy of history, andpolitical philosophy. Within each branch, there are competingschools of philosophy that promote different principles, theories, or methods.

Philosophers use a great variety of methods to arrive at philosophical knowledge. They includeconceptual analysis, reliance oncommon sense andintuitions, use ofthought experiments, analysis ofordinary language,description of experience, andcritical questioning. Philosophy is related to many other fields, such as thenatural andsocial sciences,mathematics,business,law, andjournalism. It provides aninterdisciplinary 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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Selected philosopher of the week

John Dewey (October 20, 1859 – June 1, 1952) was anAmericanphilosopher,psychologist, andeducational reformer, whose thoughts and ideas have been greatly influential in theUnited States and around the world. He, along withCharles Sanders Peirce andWilliam James, is recognized as one of the founders of the philosophical school ofPragmatism. He is also known as the father of functional psychology; he was a leading representative of theprogressive movement in U.S. education during the first half of the 20th century.

Dewey was born inBurlington, Vermont of modest family origins. He graduated from theUniversity of Vermont in 1879. He received his PhD from the Krieger School of Arts & Sciences atJohns Hopkins University in1884. From1904, he was professor of philosophy at bothColumbia University andTeachers College, Columbia University.

Along with the historianCharles A. Beard, economistsThorstein Veblen andJames Harvey Robinson, Dewey is one of the founders ofThe New School for Social Research. Dewey's most significant writings were"The Reflex Arc Concept in Psychology" (1896), a critique of a standard psychological concept and the basis of all his further work;Human Nature and Conduct (1922), a study of the role of habit in human behavior;The Public and its Problems (1927), a defense of democracy written in response toWalter Lippmann'sThe Phantom Public (1925);Experience and Nature (1929), Dewey's most "metaphysical" statement;Art as Experience (1934), Dewey's major work on aesthetics;A Common Faith (1934), a humanistic study of religion;Logic: The Theory of Inquiry (1938), an examination of Dewey's unusual conception of logic; andFreedom and Culture (1939), a political work examining the roots of fascism. While each of these works focuses upon one particular philosophical theme, Dewey wove in all of his major themes into everything he wrote.

In 1937, Dewey chaireda Commission of Enquiry which clearedTrotsky of the charges brought against him byStalin.

Selected article of the week

Philosophy of language is the reasoned inquiry into the nature, origins, and usage oflanguage. As a topic, thephilosophy of language foranalytic philosophers is concerned with four central problems: the nature ofmeaning, language use, languagecognition, and the relationship between language andreality. Forcontinental philosophers, however, the philosophy of language tends to be dealt with, not as a separate topic, but as a part oflogic,history orpolitics. (See the section "Language and Continental Philosophy" below.)

First, philosophers of language inquire into thenature of meaning, and seek to explain what it means to "mean" something. Topics in that vein include the nature ofsynonymy, the origins of meaning itself, and how any meaning can ever really be known. Another project under this heading of special interest to analytic philosophers of language is the investigation into the manner in which sentences arecomposed into a meaningful whole out of the meaning of itsparts.

Second, they would like to understand what speakers and listeners do with language incommunication, and how it is used socially. Specific interests may include the topics oflanguage learning, language creation, andspeech acts.

Third, they would like to know how language relates to the minds of both the speaker and theinterpreter. Of specific interest is the grounds for successfultranslation of words into other words.

Finally, they investigate how language and meaning relate totruth andthe world. Philosophers tend to be less concerned with which sentences areactually true, and more withwhat kinds of meanings can be true or false. A truth-oriented philosopher of language might wonder whether or not a meaningless sentence can be true or false, or whether or not sentences can express propositions about things that do not exist, rather than the way sentences are used.

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  • Image 1 A species (pl. species) is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. It can be defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes in zoological nomenclature). For example, Boa constrictor is one of the species of the genus Boa, with constrictor being the specific name. While the definitions given above may seem adequate at first glance, when looked at more closely they represent problematic species concepts. For example, the boundaries between closely related species become unclear with hybridisation, in a species complex of hundreds of similar microspecies, and in a ring species. Also, among organisms that reproduce only asexually, the concept of a reproductive species breaks down, and each clonal lineage is potentially a microspecies. Although none of these are entirely satisfactory definitions, and while the concept of species may not be a perfect model of life, it is still a useful tool to scientists and conservationists for studying life on Earth, regardless of the theoretical difficulties. If species were fixed and distinct from one another, there would be no problem, but evolutionary processes cause species to change. This obliges taxonomists to decide, for example, when enough change has occurred to declare that a fossil lineage should be divided into multiple chronospecies, or when populations have diverged to have enough distinct character states to be described as cladistic species. (Full article...)
    Image 1
    Aspecies (pl. species) is the basic unit ofclassification and ataxonomic rank of an organism, as well as a unit ofbiodiversity. It can be defined as the largest group oforganisms in which any two individuals of the appropriatesexes ormating types can produce fertileoffspring, typically bysexual reproduction. Other ways of defining species include theirkaryotype,DNA sequence,morphology, behaviour, orecological niche. In addition,palaeontologists use the concept of thechronospecies sincefossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species ofeukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (exceptviruses) are given atwo-part name, a "binomen". The first part of a binomen is the name of agenus to which the species belongs. The second part is called thespecific name or thespecific epithet (inbotanical nomenclature, also sometimes inzoological nomenclature). For example,Boa constrictor is one of the species of the genusBoa, withconstrictor being the specific name.

    While the definitions given above may seem adequate at first glance, when looked at more closely they represent problematic species concepts. For example, the boundaries between closely related species become unclear withhybridisation, in aspecies complex of hundreds of similarmicrospecies, and in aring species. Also, among organisms that reproduce onlyasexually, the concept of a reproductive species breaks down, and each clonal lineage is potentially a microspecies. Although none of these are entirely satisfactory definitions, and while the concept of species may not be a perfect model of life, it is still a useful tool to scientists andconservationists for studying life on Earth, regardless of the theoretical difficulties. If species were fixed and distinct from one another, there would be no problem, butevolutionary processes cause species to change. This obligestaxonomists to decide, for example, when enough change has occurred to declare that a fossil lineage should be divided into multiplechronospecies, or when populations have diverged to have enough distinct character states to be described ascladistic species. (Full article...)
  • Image 2 Portrait by Ludwig Gutmann (Vienna, before 1943) Wilhelm Reich (/raɪx/; Austrian German: [ˈvɪlhɛlm ˈraɪç]; 24 March 1897 – 3 November 1957) was an Austrian doctor of medicine and a psychoanalyst, a member of the second generation of analysts after Sigmund Freud. The author of several influential books, The Impulsive Character (1925), The Function of the Orgasm (1927), Character Analysis (1933), and The Mass Psychology of Fascism (1933), he became one of the most radical figures in the history of psychiatry. Reich's work on character contributed to the development of Anna Freud's The Ego and the Mechanisms of Defence (1936), and his idea of muscular armour—the expression of the personality in the way the body moves—shaped innovations such as body psychotherapy, Gestalt therapy, bioenergetic analysis and primal therapy. His writing influenced generations of intellectuals; he coined the phrase "the sexual revolution" and according to one historian acted as its midwife. During the 1968 student uprisings in Paris and Berlin, students scrawled his name on walls and threw copies of The Mass Psychology of Fascism at police. (Full article...)
    Image 2

    Portrait by Ludwig Gutmann (Vienna, before 1943)

    Wilhelm Reich (/rx/;Austrian German:[ˈvɪlhɛlmˈraɪç]; 24 March 1897 – 3 November 1957) was an Austriandoctor of medicine and apsychoanalyst, a member of the second generation of analysts afterSigmund Freud. The author of several influential books,The Impulsive Character (1925),The Function of the Orgasm (1927),Character Analysis (1933), andThe Mass Psychology of Fascism (1933), he became one of the most radical figures in the history of psychiatry.

    Reich's work on character contributed to the development ofAnna Freud'sThe Ego and the Mechanisms of Defence (1936), and his idea of muscular armour—the expression of the personality in the way the body moves—shaped innovations such asbody psychotherapy,Gestalt therapy,bioenergetic analysis andprimal therapy. His writing influenced generations of intellectuals; he coined the phrase "thesexual revolution" and according to one historian acted as its midwife. During the1968 student uprisings in Paris and Berlin, students scrawled his name on walls and threw copies ofThe Mass Psychology of Fascism at police. (Full article...)
  • Image 3 Pinker in 2023 Steven Arthur Pinker (born September 18, 1954) is a Canadian cognitive psychologist, psycholinguist, popular science author, and public intellectual. He is an advocate of evolutionary psychology and the computational theory of mind. Pinker is the Johnstone Family Professor of Psychology at Harvard University. Steven Pinker specializes in visual cognition and developmental linguistics, as well as a number of experimental topics. Pinker has written two technical books that proposed a general theory of language acquisition. In particular, his work with Alan Prince posited that children use default rules sometimes in error but are obliged to learn irregular forms one by one. Pinker is the author of nine books for general audiences. The Language Instinct (1994), How the Mind Works (1997), Words and Rules (2000), The Blank Slate (2002), and The Stuff of Thought (2007) posit that language is an innate behavior shaped by natural selection and adapted to our communication needs. Pinker's The Sense of Style (2014) is a general language-oriented style guide. Pinker's book The Better Angels of Our Nature (2010) posits that violence in human societies has generally declined over time, and identifies six major trends and five historical forces of this decline. Enlightenment Now (2018) further argues that the human condition has generally improved over recent history because of reason, science, and humanism. The nature and importance of reason is also discussed in his book Rationality: What It Is, Why It Seems Scarce, Why It Matters (2021). (Full article...)
    Image 3

    Pinker in 2023

    Steven Arthur Pinker (born September 18, 1954) is a Canadiancognitive psychologist,psycholinguist,popular scienceauthor, andpublic intellectual. He is an advocate ofevolutionary psychology and thecomputational theory of mind. Pinker is the Johnstone Family Professor of Psychology atHarvard University.

    Steven Pinker specializes in visual cognition anddevelopmental linguistics, as well as a number of experimental topics. Pinker has written two technical books that proposed a general theory oflanguage acquisition. In particular, his work withAlan Prince posited that children use default rules sometimes in error but are obliged to learn irregular forms one by one. Pinker is the author of nine books for general audiences.The Language Instinct (1994),How the Mind Works (1997),Words and Rules (2000),The Blank Slate (2002), andThe Stuff of Thought (2007) posit that language is an innate behavior shaped bynatural selection andadapted to our communication needs. Pinker'sThe Sense of Style (2014) is a general language-orientedstyle guide. Pinker's bookThe Better Angels of Our Nature (2010) posits that violence in human societies has generally declined over time, and identifies six major trends and five historical forces of this decline.Enlightenment Now (2018) further argues that the human condition has generally improved over recent history because of reason, science, andhumanism. The nature and importance of reason is also discussed in his bookRationality: What It Is, Why It Seems Scarce, Why It Matters (2021). (Full article...)
  • Image 4 The Royal Commission on Animal Magnetism involved two entirely separate and independent French Royal Commissions, each appointed by Louis XVI in 1784, that were conducted simultaneously by a committee composed of four physicians from the Paris Faculty of Medicine (Faculté de médecine de Paris) and five scientists from the Royal Academy of Sciences (Académie des sciences) (the "Franklin Commission", named for Benjamin Franklin), and a second committee composed of five physicians from the Royal Society of Medicine (Société Royale de Médecine) (the "Society Commission"). Each Commission took five months to complete its investigations. The "Franklin" Report was presented to the King on 11 August 1784 – and was immediately published and very widely circulated throughout France and neighbouring countries – and the "Society" Report was presented to the King five days later on 16 August 1784. (Full article...)
    Image 4
    TheRoyal Commission on Animal Magnetism involved two entirely separate and independent French Royal Commissions, each appointed byLouis XVI in 1784, that were conducted simultaneously by a committee composed of four physicians from theParis Faculty of Medicine (Faculté de médecine de Paris) and five scientists from theRoyal Academy of Sciences (Académie des sciences) (the "Franklin Commission", named forBenjamin Franklin), and a second committee composed of five physicians from theRoyal Society of Medicine (Société Royale de Médecine) (the "Society Commission").

    Each Commission took five months to complete its investigations. The "Franklin" Report was presented to the King on 11 August 1784 – and was immediately published and very widely circulated throughout France and neighbouring countries – and the "Society" Report was presented to the King five days later on 16 August 1784. (Full article...)
  • Image 5 Broad classification of Karmas as per Jain philosophy Karma is the basic principle within an overarching psycho-cosmology in Jainism. Human moral actions form the basis of the transmigration of the soul (jīva). The soul is constrained to a cycle of rebirth, trapped within the temporal world (saṃsāra), until it finally achieves liberation (mokṣa). Liberation is achieved by following a path of purification. Jains believe that karma is a physical substance that is everywhere in the universe. Karma particles are attracted to the soul by the actions of that soul. Karma particles are attracted when we do, think, or say things, when we kill something, when we lie, when we steal and so on. Karma not only encompasses the causality of transmigration, but is also conceived of as an extremely subtle matter, which infiltrates the soul—obscuring its natural, transparent and pure qualities. Karma is thought of as a kind of pollution, that taints the soul with various colours (leśyā). Based on its karma, a soul undergoes transmigration and reincarnates in various states of existence—like heavens or hells, or as humans or animals. (Full article...)
    Image 5
    Broad classification ofKarmas as per Jain philosophy

    Karma is the basic principle within an overarching psycho-cosmology inJainism. Human moral actions form the basis of the transmigration of thesoul (jīva). The soul is constrained to a cycle of rebirth, trapped within thetemporal world (saṃsāra), until it finally achieves liberation (mokṣa). Liberation is achieved by following a path of purification.

    Jains believe that karma is a physical substance that is everywhere in the universe. Karma particles are attracted to the soul by the actions of that soul. Karma particles are attracted when we do, think, or say things, when we kill something, when we lie, when we steal and so on. Karma not only encompasses thecausality of transmigration, but is also conceived of as an extremely subtle matter, which infiltrates thesoul—obscuring its natural, transparent and pure qualities. Karma is thought of as a kind of pollution, that taints the soul with various colours (leśyā). Based on its karma, a soul undergoes transmigration andreincarnates in various states of existence—like heavens or hells, or as humans or animals. (Full article...)
  • Image 6 "In Praise of Polytheism (On Monomythical and Polymythical Thinking)" (German: Lob des Polytheismus. Über Monomythie und Polymythie) is an essay by the German philosopher Odo Marquard, which was held as a lecture at Technische Universität Berlin in 1978. It was first published in 1979 in an anthology, and was published again in 1981 in Marquard's book Farewell to Matters of Principle (German: Abschied vom Prinzipiellen). The essay posits that monotheism and the Enlightenment are based on "monomythical thinking", meaning that they only allow one story. It also posits that the separation of powers and the individual have their origin in polytheism, and argues that people should embrace what Marquard calls "enlightened polymythical thinking"—the recognition of several stories in the modern world. Marquard was a professor of philosophy and proponent of scepticism and pluralism. He belonged to a part of German philosophy that viewed the issues of modernity through political theology, which associates modern political concepts with theological concepts. Some of the points in the essay have precursors in the writings of Max Weber, Erik Peterson and Friedrich Nietzsche. (Full article...)
    Image 6
    "In Praise of Polytheism (On Monomythical and Polymythical Thinking)" (German:Lob des Polytheismus. Über Monomythie und Polymythie) is an essay by theGerman philosopherOdo Marquard, which was held as a lecture atTechnische Universität Berlin in 1978. It was first published in 1979 in an anthology, and was published again in 1981 in Marquard's bookFarewell to Matters of Principle (German:Abschied vom Prinzipiellen).

    The essay posits thatmonotheism and theEnlightenment are based on "monomythical thinking", meaning that they only allow one story. It also posits that theseparation of powers and theindividual have their origin inpolytheism, and argues that people should embrace what Marquard calls "enlightened polymythical thinking"—the recognition of several stories in the modern world. Marquard was a professor of philosophy and proponent ofscepticism andpluralism. He belonged to a part of German philosophy that viewed the issues ofmodernity throughpolitical theology, which associates modern political concepts withtheological concepts. Some of the points in the essay have precursors in the writings ofMax Weber,Erik Peterson andFriedrich Nietzsche. (Full article...)
  • Image 7 The Upanishads (/ʊˈpʌnɪʃʌdz/; Sanskrit: उपनिषद्, IAST: Upaniṣad, pronounced [ˈupɐniʂɐd]) are Sanskrit texts of the late Vedic and post-Vedic periods that "document the transition from the archaic ritualism of the Veda into new religious ideas and institutions" and the emergence of the central religious concepts of Hinduism. They are the most recent addition to the Vedas, the oldest scriptures of Hinduism, and deal with meditation, philosophy, consciousness, and ontological knowledge. Earlier parts of the Vedas dealt with mantras, benedictions, rituals, ceremonies, and sacrifices. While among the most important literature in the history of Indian religions and culture, the Upanishads document a wide variety of "rites, incantations, and esoteric knowledge" departing from Vedic ritualism and interpreted in various ways in the later commentarial traditions. The Upanishads are widely known, and their diverse ideas, interpreted in various ways, informed later traditions of Hinduism. The central concern of all Upanishads is to discover the relations between ritual, cosmic realities (including gods), and the human body/person, postulating Ātman and Brahman as the "summit of the hierarchically arranged and interconnected universe", but various ideas about the relation between Atman and Brahman can be found. (Full article...)
    Image 7

    TheUpanishads (/ʊˈpʌnɪʃʌdz/;Sanskrit:उपनिषद्,IAST:Upaniṣad,pronounced[ˈupɐniʂɐd]) areSanskrit texts of thelate Vedic and post-Vedic periods that "document the transition from the archaic ritualism of theVeda into new religious ideas and institutions" and the emergence of the central religious concepts ofHinduism. They are the most recent addition to theVedas, the oldest scriptures of Hinduism, and deal withmeditation,philosophy,consciousness, andontological knowledge. Earlier parts of the Vedas dealt with mantras, benedictions, rituals, ceremonies, and sacrifices.

    While among the most important literature in the history of Indian religions and culture, the Upanishads document a wide variety of "rites, incantations, and esoteric knowledge" departing from Vedic ritualism and interpreted in various ways in the later commentarial traditions. The Upanishads are widely known, and their diverse ideas, interpreted in various ways, informed later traditions of Hinduism. The central concern of all Upanishads is to discover the relations between ritual, cosmic realities (including gods), and the human body/person, postulatingĀtman andBrahman as the "summit of the hierarchically arranged and interconnected universe", but various ideas about the relation between Atman and Brahman can be found. (Full article...)
  • Image 8 Rand in 1943 Alice O'Connor (born Alisa Zinovyevna Rosenbaum; February 2 [O.S. January 20], 1905 – March 6, 1982), better known by her pen name Ayn Rand (/aɪn/ ⓘ), was a Russian-American writer and philosopher. She is known for her fiction and for developing a philosophical system which she named Objectivism. Born and educated in Russia, she moved to the United States in 1926. After two early novels that were initially unsuccessful and two Broadway plays, Rand achieved fame with her 1943 novel The Fountainhead. In 1957, she published her best-selling work, the novel Atlas Shrugged. Afterward, until her death in 1982, she turned to non-fiction to promote her philosophy, publishing her own periodicals and releasing several collections of essays. (Full article...)
    Image 8

    Rand in 1943

    Alice O'Connor (bornAlisa Zinovyevna Rosenbaum; February 2 [O.S. January 20], 1905 – March 6, 1982), better known by her pen nameAyn Rand (/n/ ), was a Russian-American writer and philosopher. She is known for her fiction and for developing a philosophical system which she namedObjectivism.

    Born and educated in Russia, she moved to the United States in 1926. After two early novels that were initially unsuccessful and twoBroadway plays, Rand achieved fame with her 1943 novelThe Fountainhead. In 1957, she published her best-selling work, the novelAtlas Shrugged. Afterward, until her death in 1982, she turned to non-fiction to promote her philosophy, publishing her ownperiodicals and releasing several collections of essays. (Full article...)
  • Image 9 The hard–easy effect is a cognitive bias that manifests itself as a tendency to overestimate the probability of one's success at a task perceived as hard, and to underestimate the likelihood of one's success at a task perceived as easy. The hard-easy effect takes place, for example, when individuals exhibit a degree of underconfidence in answering relatively easy questions and a degree of overconfidence in answering relatively difficult questions. "Hard tasks tend to produce overconfidence but worse-than-average perceptions," reported Katherine A. Burson, Richard P. Larrick, and Jack B. Soll in a 2005 study, "whereas easy tasks tend to produce underconfidence and better-than-average effects." The hard-easy effect falls under the umbrella of "social comparison theory", which was originally formulated by Leon Festinger in 1954. Festinger argued that individuals are driven to evaluate their own opinions and abilities accurately, and social comparison theory explains how individuals carry out those evaluations by comparing themselves to others. (Full article...)
    Image 9
    Thehard–easy effect is acognitive bias that manifests itself as a tendency to overestimate the probability of one's success at a task perceived as hard, and to underestimate the likelihood of one's success at a task perceived as easy. The hard-easy effect takes place, for example, when individuals exhibit a degree of underconfidence in answering relatively easy questions and a degree of overconfidence in answering relatively difficult questions. "Hard tasks tend to produce overconfidence but worse-than-average perceptions," reported Katherine A. Burson, Richard P. Larrick, and Jack B. Soll in a 2005 study, "whereas easy tasks tend to produce underconfidence and better-than-average effects."

    The hard-easy effect falls under the umbrella of "social comparison theory", which was originally formulated byLeon Festinger in 1954. Festinger argued that individuals are driven to evaluate their own opinions and abilities accurately, and social comparison theory explains how individuals carry out those evaluations by comparing themselves to others. (Full article...)
  • Image 10 Relief representing ahimsa 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 principle 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...)
    Image 10
    Relief representingahimsa

    InJainism,ahiṃsā (Ahimsā, alternatively spelled 'ahinsā',Sanskrit: अहिंसाIAST:ahiṃsā,Pāli:avihinsā) is a fundamental principle forming the cornerstone of itsethics and doctrine. The termahiṃsā meansnonviolence, 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 principle 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 ofahimsa is very different from the concept of nonviolence found in other philosophies. Violence is usually associated with causing harm to others. But according to theJain philosophy, violence refers primarily to injuring one's own self – behaviour which inhibits the soul's own ability to attainmoksha (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 ofahimsa. According to Jainism, protection of life, also known asabhayadānam, is the supreme charity that a person can make. (Full article...)
  • Image 11 Roman marble bust of Epicurus Epicurus (/ˌɛpɪˈkjʊərəs/, EH-pih-KURE-əs; Ancient Greek: Ἐπίκουρος Epikouros; 341–270 BC) was an ancient Greek philosopher who founded Epicureanism, a highly influential school of philosophy; it asserted that philosophy's purpose is to attain as well as to help others attain tranquil lives, characterized by freedom from fear and the absence of pain. Epicurus advocated that people were best able to pursue philosophy by living a self-sufficient life surrounded by friends; he and his followers were known for eating simple meals and discussing a wide range of philosophical subjects at "The Garden", the school he established in Athens. Epicurus taught that although the gods exist, they have no involvement in human affairs. Like the earlier philosopher Democritus, Epicurus claimed that all occurrences in the natural world are ultimately the result of tiny, invisible particles known as atoms moving and interacting in empty space, though Epicurus also deviated from Democritus by proposing the idea of atomic "swerve", which holds that atoms may deviate from their expected course, thus permitting humans to possess free will in an otherwise deterministic universe. (Full article...)
    Image 11

    Roman marble bust of Epicurus

    Epicurus (/ˌɛpɪˈkjʊərəs/,EH-pih-KURE-əs;Ancient Greek:ἘπίκουροςEpikouros; 341–270 BC) was anancient Greek philosopher who foundedEpicureanism, a highly influential school ofphilosophy; it asserted that philosophy's purpose is to attain as well as to help others attain tranquil lives, characterized by freedom from fear and the absence of pain.

    Epicurus advocated that people were best able to pursue philosophy by living a self-sufficient life surrounded by friends; he and his followers were known for eating simple meals and discussing a wide range of philosophical subjects at "The Garden", the school he established inAthens. Epicurus taught that although the gods exist, they have no involvement in human affairs. Like the earlier philosopherDemocritus, Epicurus claimed that all occurrences in the natural world are ultimately the result of tiny, invisible particles known asatoms moving and interacting in empty space, though Epicurus also deviated from Democritus by proposing the idea ofatomic "swerve", which holds that atoms may deviate from their expected course, thus permitting humans to possessfree will in an otherwisedeterministic universe. (Full article...)
  • Image 12 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...)
    Image 12
    Maitreyi (fl. 8th century BCE) was an Indian philosopher who lived during the laterVedic period inancient India. She is mentioned in theBrihadaranyaka Upanishad as one of two wives of the Vedic sageYajnavalkya. In the Hindu epicMahabharata and theGṛhyasūtras, however, Maitreyi is described as anAdvaita philosopher who never married. In ancientSanskrit literature, she is known as abrahmavadini (an expounder of theVeda).

    Maitreyi appears in ancient Indian texts, such as in a dialogue where she explores the Hindu concept ofAtman (soul or self) in a dialogue with Yajnavalkya in theBrihadaranyaka Upanishad. According to this dialogue, love is driven by a person's soul, and Maitreyi discusses the nature of Atman and Brahman and theirunity, the core ofAdvaita philosophy. This Maitreyi-Yajnavalkya dialogue is the topic ofSureshvara'svarttika, a commentary. (Full article...)
  • Image 13 Roman copy (in marble) of a Greek bronze bust of Aristotle by Lysippos (c. 330 BC), with modern alabaster mantle Aristotle (Attic Greek: Ἀριστοτέλης, romanized: Aristotélēs; 384–322 BC) was an ancient Greek philosopher and polymath. His writings cover a broad range of subjects spanning the natural sciences, philosophy, linguistics, economics, politics, psychology, and the arts. As the founder of the Peripatetic school of philosophy in the Lyceum in Athens, he began the wider Aristotelian tradition that followed, which set the groundwork for the development of modern science. Little is known about Aristotle's life. He was born in the city of Stagira in northern Greece during the Classical period. His father, Nicomachus, died when Aristotle was a child, and he was brought up by a guardian. At around eighteen years old, he joined Plato's Academy in Athens and remained there until the age of thirty seven (c. 347 BC). Shortly after Plato died, Aristotle left Athens and, at the request of Philip II of Macedon, tutored his son Alexander the Great beginning in 343 BC. He established a library in the Lyceum, which helped him to produce many of his hundreds of books on papyrus scrolls. (Full article...)
    Image 13

    Roman copy (in marble) of aGreek bronze bust of Aristotle byLysippos (c. 330 BC), with modern alabaster mantle

    Aristotle (Attic Greek:Ἀριστοτέλης,romanized: Aristotélēs; 384–322 BC) was anancient Greek philosopher andpolymath. His writings cover a broad range of subjects spanning thenatural sciences,philosophy,linguistics,economics,politics,psychology, andthe arts. As the founder of thePeripatetic school of philosophy in theLyceum inAthens, he began the widerAristotelian tradition that followed, which set the groundwork for the development of modernscience.

    Little is known about Aristotle's life. He was born in the city ofStagira innorthern Greece during theClassical period. His father,Nicomachus, died when Aristotle was a child, and he was brought up by a guardian. At around eighteen years old, he joinedPlato'sAcademy in Athens and remained there until the age of thirty seven (c. 347 BC). Shortly after Plato died, Aristotle left Athens and, at the request ofPhilip II of Macedon, tutored his sonAlexander the Great beginning in 343 BC. He established a library in the Lyceum, which helped him to produce many of his hundreds of books onpapyrusscrolls. (Full article...)
  • Image 14 Winkler County, Texas The Winkler County nurse whistleblower case was a series of legal proceedings in West Texas concerning the retaliation against two nurses who submitted an anonymous state medical board complaint against a physician in 2009. The case attracted national attention for its implications on whistleblowing by nurses. After witnessing what they believed to be unsafe medical care, nurses Anne Mitchell and Vicki Galle submitted an anonymous complaint against Dr. Rolando Arafiles to the Texas Medical Board (TMB). When he learned of the complaint, Arafiles spoke with the sheriff of Winkler County, alleging that the nurses' reports to the medical board constituted harassment. The sheriff investigated and obtained the TMB complaint, which provided enough information that Galle and Mitchell could be identified as the sources of the complaint. Galle and Mitchell were terminated from the hospital and faced criminal charges of misuse of official information. Galle's charges were dropped before trial and Mitchell was acquitted by a jury. In the aftermath of Mitchell's trial, Arafiles, several county officials and a hospital administrator all faced jail time for their roles in the retaliation against the nurses. (Full article...)
    Image 14
    Winkler County, Texas

    TheWinkler County nurse whistleblower case was a series of legal proceedings inWest Texas concerning the retaliation against two nurses who submitted an anonymous state medical board complaint against a physician in 2009. The case attracted national attention for its implications onwhistleblowing by nurses.

    After witnessing what they believed to be unsafe medical care, nurses Anne Mitchell and Vicki Galle submitted an anonymous complaint against Dr. Rolando Arafiles to theTexas Medical Board (TMB). When he learned of the complaint, Arafiles spoke with the sheriff ofWinkler County, alleging that the nurses' reports to the medical board constituted harassment. The sheriff investigated and obtained the TMB complaint, which provided enough information that Galle and Mitchell could be identified as the sources of the complaint. Galle and Mitchell were terminated from the hospital and faced criminal charges of misuse of official information. Galle's charges were dropped before trial and Mitchell was acquitted by a jury. In the aftermath of Mitchell's trial, Arafiles, several county officials and a hospital administrator all faced jail time for their roles in the retaliation against the nurses. (Full article...)
  • Image 15 Huygens by Caspar Netscher (1671), Museum Boerhaave, Leiden Christiaan Huygens, Lord of Zeelhem, FRS (/ˈhaɪɡənz/ HY-gənz, US also /ˈhɔɪɡənz/ HOY-gənz; Dutch: [ˈkrɪstijaːn ˈɦœyɣə(n)s] ⓘ; also spelled Huyghens; Latin: Hugenius; 14 April 1629 – 8 July 1695) was a Dutch mathematician, physicist, engineer, astronomer, and inventor who is regarded as a key figure in the Scientific Revolution. In physics, Huygens made seminal contributions to optics and mechanics, while as an astronomer he studied the rings of Saturn and discovered its largest moon, Titan. As an engineer and inventor, he improved the design of telescopes and invented the pendulum clock, the most accurate timekeeper for almost 300 years. A talented mathematician and physicist, Huygens authored the first modern treatise where a physical problem was idealized using mathematical parameters, while his work on light contains the first mathematical and mechanistic explanation of an unobservable physical phenomenon. Huygens first identified the correct laws of elastic collision in his work De Motu Corporum ex Percussione, completed in 1656 but published posthumously in 1703. In 1659, Huygens derived geometrically the formula in classical mechanics for the centrifugal force in his work De vi Centrifuga, a decade before Isaac Newton. In optics, he is best known for his wave theory of light, which he described in his Traité de la Lumière (1690). His theory of light was initially rejected in favour of Newton's corpuscular theory of light, until Augustin-Jean Fresnel adapted Huygens's principle to give a complete explanation of the rectilinear propagation and diffraction effects of light in 1821. Today this principle is known as the Huygens–Fresnel principle. (Full article...)
    Image 15

    Christiaan Huygens, Lord of Zeelhem,FRS (/ˈhɡənz/HY-gənz,US also/ˈhɔɪɡənz/HOY-gənz;Dutch:[ˈkrɪstijaːnˈɦœyɣə(n)s]; also spelledHuyghens;Latin:Hugenius; 14 April 1629 – 8 July 1695) was a Dutch mathematician, physicist, engineer, astronomer, and inventor who is regarded as a key figure in theScientific Revolution. In physics, Huygens made seminal contributions tooptics andmechanics, while as an astronomer he studied therings of Saturn and discovered its largest moon,Titan. As an engineer and inventor, he improved the design of telescopes and invented thependulum clock, the most accurate timekeeper for almost 300 years. A talented mathematician and physicist, Huygens authored the first modern treatise where a physical problem was idealized usingmathematical parameters, while his work on light contains the first mathematical and mechanistic explanation of an unobservable physical phenomenon.

    Huygens first identified the correct laws ofelastic collision in his workDe Motu Corporum ex Percussione, completed in 1656 but published posthumously in 1703. In 1659, Huygens derived geometrically the formula inclassical mechanics for thecentrifugal force in his workDe vi Centrifuga, a decade beforeIsaac Newton. In optics, he is best known for hiswave theory of light, which he described in hisTraité de la Lumière (1690). His theory of light was initially rejected in favour of Newton'scorpuscular theory of light, untilAugustin-Jean Fresnel adapted Huygens's principle to give a complete explanation of the rectilinear propagation and diffraction effects of light in 1821. Today this principle is known as theHuygens–Fresnel principle. (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 overlappingbranches 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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