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The history of philosophy is the study of philosophical ideas and concepts through time. Issues specifically related to history of philosophy might include (but are not limited to): How can changes in philosophy be accounted for historically? What drives the development of thought in its historical context? To what degree can philosophical texts from prior historical eras be understood even today?

Many societies have considered philosophical questions and built philosophical traditions based upon each other's works.

All cultures — be they prehistoric, ancient, medieval, or modern; Eastern, Western, religious, or secular — have had their own unique schools of philosophy, arrived at through both inheritance and through independent discovery. Such theories have grown from different premises and approaches, examples of which include (but are not limited to) rationalism (theories arrived at through logic), empiricism (theories arrived at through observation), and even through leaps of faith, hope and inheritance (such as the supernaturalist philosophies and religions).

History of philosophy seeks to catalogue and classify such development. The goal is to understand the development of philosophical ideas through time.

Eastern philosophy is organized by the chronological periods of each region. Historians of Western philosophy usually divide the subject into three or more periods, the most important being ancient philosophy, medieval philosophy, and modern philosophy.

Definition

Philosophy is the study of general and fundamental problems, such as those connected with reality, existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational argument. In more casual speech, by extension, "philosophy" can refer to "the most basic beliefs, concepts, and attitudes of an individual or group".

The word "philosophy" comes from the Ancient Greek φιλοσοφία (philosophia), which literally means "love of wisdom". The introduction of the terms "philosopher" and "philosophy" has been ascribed to the Greek thinker Pythagoras.

Ancient philosophy

Babylonian philosophy

The origins of Babylonian philosophy can be traced back to the wisdom of early Mesopotamia, which embodied certain philosophies of life, particularly ethics, in the forms of dialectic, dialogues, epic poetry, folklore, hymns, lyrics, prose, and proverbs. The reasoning and rationality of the Babylonians developed beyond empirical observation. The Babylonian text Dialog of Pessimism contains similarities to the agnostic thought of the sophists, the Heraclitean doctrine of contrasts, and the dialogues of Plato, as well as a precursor to the maieutic Socratic method of Socrates and Plato. The Phoenician philosopher Thales also studied philosophy in Mesopotamia.

Ancient Egyptian philosophy

See also: Hellenistic philosophy

There are authors who date the philosophical maxims of Ptahhotep before the 25th century. For instance, Pulitzer Prize winning historian Will Durant dates these writings as early as 2880 BCE within The Story of Civilization: Our Oriental History. Durant claims that Ptahhotep could be considered the very first philosopher in virtue of having the earliest and surviving fragments of moral philosophy (i.e., "The Maxims of Ptah-Hotep"). Ptahhotep's grandson, Ptahhotep Tshefi, is traditionally credited with being the author of the collection of wise sayings known as The Maxims of Ptahhotep, whose opening lines attribute authorship to the vizier Ptahhotep: Instruction of the Mayor of the city, the Vizier Ptahhotep, under the Majesty of King Isesi.

Ancient Indian philosophy

Further information: Hindu philosophy, Buddhist philosophy, Jain philosophy, and Upanishads

The term Indian philosophy (Sanskrit: Darshanas), refers to any of several schools of philosophical thought that originated in the Indian subcontinent, including Hindu philosophy, Buddhist philosophy, and Jain philosophy. Having the same or rather intertwined origins, all of these philosophies have a common underlying themes of Dharma and Karma, and similarly attempt to explain the attainment of emancipation. They have been formalized and promulgated chiefly between 1000 BC to a few centuries AD.

India's philosophical tradition dates back to the composition of the Upanisads in the later Vedic period (c. 1000-500 BCE). Subsequent schools (Skt: Darshanas) of Indian philosophy were identified as orthodox (Skt: astika) or non-orthodox (Skt: nastika) depending on whether they regarded the Vedas as an infallible source of knowledge. By some classifications, there are six schools of orthodox Hindu philosophy and three heterodox schools. The orthodox are Nyaya, Vaisesika, Samkhya, Yoga, Purva mimamsa and Vedanta. The Heterodox are Jain, Buddhist and materialist (Cārvāka). Other classifications also include Pashupata, Saiva, Raseśvara and Pāṇini Darśana with the other orthodox schools.

Competition and integration between the various schools was intense during their formative years, especially between 500 BC to 200 AD. Some like the Jain, Buddhist, Shaiva and Vedanta schools survived, while others like Samkhya and Ajivika did not, either being assimilated or going extinct. The Sanskrit term for "philosopher" is dārśanika, one who is familiar with the systems of philosophy, or darśanas.

In the history of the Indian subcontinent, following the establishment of a Vedic culture, the development of philosophical and religious thought over a period of two millennia gave rise to what came to be called the six schools of astika, or orthodox, Indian or Hindu philosophy. These schools have come to be synonymous with the greater religion of Hinduism, which was a development of the early Vedic religion.

Ancient Persian philosophy

Persian philosophy can be traced back as far as Old Iranian philosophical traditions and thoughts, with their ancient Indo-Iranian roots. These were considerably influenced by Zarathustra's teachings. Throughout Iranian history and due to remarkable political and social influences such as the Macedonian, the Arab, and the Mongol invasions of Persia, a wide spectrum of schools of thought arose. These espoused a variety of views on philosophical questions, extending from Old Iranian and mainly Zoroastrianism-influenced traditions to schools appearing in the late pre-Islamic era, such as Manicheism and Mazdakism, as well as various post-Islamic schools. Iranian philosophy after Arab invasion of Persia is characterized by different interactions with the old Iranian philosophy, the Greek philosophy and with the development of Islamic philosophy. Illuminationism and the transcendent theosophy are regarded as two of the main philosophical traditions of that era in Persia. Zoroastrianism has been identified as one of the key early events in the development of philosophy.

Ancient Chinese philosophy

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Confucius, illustrated in Myths & Legends of China, 1922, by E.T.C. Werner.

Philosophy has had a tremendous effect on Chinese civilization, and throughout East Asia. The majority of Chinese philosophy originates in the Spring and Autumn and Warring States era, during a period known as the "Hundred Schools of Thought", which was characterized by significant intellectual and cultural developments. It was during this era that the major philosophies of China, Confucianism, Mohism, Legalism, and Taoism, arose, along with philosophies that later fell into obscurity, like Agriculturalism, Chinese Naturalism, and the Logicians. Of the many philosophical schools of China, only Confucianism and Taoism existed after the Qin Dynasty suppressed any Chinese philosophy that was opposed to Legalism.

Confucianism is humanistic, philosophy that believes that human beings are teachable, improvable and perfectible through personal and communal endeavour especially including self-cultivation and self-creation. Confucianism focuses on the cultivation of virtue and maintenance of ethics, the most basic of which are ren, yi, and li. Ren is an obligation of altruism and humaneness for other individuals within a community, yi is the upholding of righteousness and the moral disposition to do good, and li is a system of norms and propriety that determines how a person should properly act within a community.

Taoism focuses on establishing harmony with the Tao, which is origin of and the totality of everything that exists. The word "Tao" (or "Dao", depending on the romanization scheme) is usually translated as "way", "path" or "principle". Taoist propriety and ethics emphasize the Three Jewels of the Tao: compassion, moderation, and humility, while Taoist thought generally focuses on nature, the relationship between humanity and the cosmos (天人相应); health and longevity; and wu wei, action through inaction. Harmony with the Universe, or the origin of it through the Tao, is the intended result of many Taoist rules and practices.

Phoenician philosophy

See also: Ancient Greek philosophy

Thales (c. 624 BC – c. 546 BC) was a Phoenician pre-Socratic philosopher from Miletus in Asia Minor, regarded as one of the Seven Sages of Greece. Many, most notably Aristotle, regard him as the first philosopher in the Greek tradition. According to Bertrand Russell, "Western philosophy begins with Thales." In turn, his thought was greatly influenced by the Egyptian and Babylonian philosophical traditions. The study of logic and proof has played a central role in mathematics since the times of Thales Miletus, who is regarded as one of the earliest known mathematicians to offer deductive arguments.

In the Mediterranean region, the concept of an atom was originally proposed by the Phoenician philosopher Mochos of Sidon, who lived in Phoenicia (present-day Lebanon) some time before the 5th century BC. He originated the philosophy of atomism later associated with Greek philosophers Democritus and Epicurus. [2] [3] [4]

Another ancient Greek philosopher greatly influenced by Phoenician philosphy was Pythagoras, who studied in the Phoenician city of Sidon, as well as Egypt and Mesopotamia.

Ancient Greek philosophy

See also: Hellenistic philosophy

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Plato (left) and Aristotle (right): detail from The School of Athens by Raffaello Sanzio, 1509

Ancient Greek philosophy is a period of Western philosophy, starting in the 6th century [c. 585] BC to the 6th century AD. It is usually divided into three periods: the pre-Socratic period, the Ancient Classical Greek period of Plato and Aristotle, and the post-Aristotelian (or Hellenistic) period. A fourth period that is sometimes added includes the Neoplatonic and Christian philosophers of Late Antiquity. The most important of the ancient philosophers (in terms of subsequent influence) are Plato and Aristotle. Plato specifically, is credited as the founder of Western philosophy. The philosopher Alfred North Whitehead said of Plato: "The safest general characterization of the European philosophical tradition is that it consists of a series of footnotes to Plato. I do not mean the systematic scheme of thought which scholars have doubtfully extracted from his writings. I allude to the wealth of general ideas scattered through them."

It was said in Roman Ancient history that Pythagoras was the first man to call himself a philosopher, or lover of wisdom, and Pythagorean ideas exercised a marked influence on Plato, and through him, all of Western philosophy. Plato and Aristotle, the first Classical Greek philosophers, did refer critically to other simple "wise men", which were called in Greek "sophists," and which were common before Pythagoras' time. From their critique it appears that a distinction was then established in their onw Classical period between the more elevated and pure "lovers of wisdom" (the true Philosophers), and these other earlier and more common traveling teachers, who often also earned money from their craft.

The main subjects of ancient philosophy are: understanding the fundamental causes and principles of the universe; explaining it in an economical way; the epistemological problem of reconciling the diversity and change of the natural universe, with the possibility of obtaining fixed and certain knowledge about it; questions about things that cannot be perceived by the senses, such as numbers, elements, universals, and gods. Socrates is said to have been the initiator of more focused study upon the human things including the analysis of patterns of reasoning and argument and the nature of the good life and the importance of understanding and knowledge in order to pursue it; the explication of the concept of justice, and its relation to various political systems.

Hellenistic philosophy

During the Hellenistic and Roman periods, many different schools of thought developed in the Hellenistic world and then the Greco-Roman world. There were Greeks, Romans, Egyptians, Syrians and Arabs who contributed to the development of Hellenistic philosophy. Elements of Persian philosophy and Indian philosophy also had an influence. The most notable schools of Hellenistic philosophy were:

• Middle Platonism
  • Antiochus of Ascalon (Palestinian), Plutarch (Greek/Roman), Theon of Smyrna (Greek), Gaius the Platonist (Greek/Roman)
• Neoplatonism
  • Plotinus (Egyptian), Ammonius Saccas (Egyptian), Porphyry (Syrian), Zethos (Arab), Iamblichus (Syrian), Proclus (Greek)
• Neopythagoreanism
  • Nigidius Figulus (Roman), Apollonius of Tyana (Anatolian) Numenius of Apamea (Syrian)
• Academic Skepticism
  • Arcesilaus (Greek), Carneades (Libyan), Cicero (Roman)
• Pyrrhonian Skepticism
  • Pyrrho (Greek), Sextus Empiricus (Egyptian)
• Cynicism
  • Diogenes of Sinope (Greek), Crates of Thebes (Greek)
• Stoicism
  • Zeno of Citium (Phoenician), Cleanthes (Greek), Chrysippus (Greek), Crates of Mallus (brought Stoicism to Rome c. 170 BCE), Panaetius (Greek), Posidonius (Syrian), Seneca (Roman), Epictetus (Greek/Roman), Marcus Aurelius (Roman)
• Epicureanism
  • Epicurus (Greek) Lucretius (Roman)
• Eclecticism
  • Antiochus of Ascalon (Palestinian), Cicero (Roman)

The spread of Christianity throughout the Roman world, followed by the spread of Islam, ushered in the end of Hellenistic philosophy and the beginnings of Medieval philosophy, which was dominated by the three Abrahamic traditions: Jewish philosophy, Christian philosophy, and early Islamic philosophy.

5th–16th centuries

Indian philosophy

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Adi Shankara

The period between 5th and 9th century CE was the most brilliant epoch in the development of Indian philosophy as Hindu and Buddhist philosophies flourished side by side. Of these various schools of thought the non-dualistic Advaita Vedanta emerged as the most influential and most dominant school of philosophy. The major philosophers of this school were Gaudapada, Adi Shankara and Vidyaranya.

Advaita Vedanta rejects theism and dualism by insisting that “Brahman [ultimate reality] is without parts or attributes...one without a second.” Since Brahman has no properties, contains no internal diversity and is identical with the whole reality, it cannot be understood as God. Brahman though being indescribable is at best described as Satchidananda (merging "Sat" + "Chit" + "Ananda", i.e., Existence, Consciousness and Bliss) by Shankara. Advaita ushered a new era in Indian philosophy and as a result, many new schools of thought arose in the medieval period. Some of them were Visishtadvaita (qualified monism), Dvaita (dualism), Dvaitadvaita (dualism-nondualism), Suddhadvaita (pure non-dualism), Achintya Bheda Abheda and Pratyabhijña (the recognitive school).

Islamic philosophy

In early Islamic thought, which refers to philosophy during the "Islamic Golden Age", traditionally dated between the 8th and 12th centuries, two main currents may be distinguished. The first is Kalam, that mainly dealt with Islamic theological questions. These include the Mu'tazili and Ash'ari. The other is Falsafa, that was founded on interpretations of Aristotelianism and Neoplatonism. There were attempts by later philosopher-theologians at harmonizing both trends, notably by Ibn Sina (Avicenna) who founded the school of Avicennism, Ibn Rushd (Averroës) who founded the school of Averroism, and others such as Ibn al-Haytham (Alhacen) and Abū Rayhān al-Bīrūnī.

Islamic philosophy as Henry Corbin describes is a philosophy whose development, and whose modalities, are essentially linked to the religious and spiritual fact of Islam. In the other word, it represents the style of philosophy produced within the framework of Islamic culture. This description does not suggest that it is necessarily concerned with religious issues, nor even that it is exclusively produced by Muslims.

Henry Corbin has divided the history of Islamic philosophy into three periods: the 7th-12th centuries, the 12th-18th centuries, and the 18th-20th centuries.

7th-12th centuries

Religious roots (7th-8th centuries)

Theoretical questions were raised right from the beginning of Islam, questions which could to a certain extent be answered by reference to Islamic texts such as the Quran, the practices of the community and the traditional sayings of Muhammad, the Prophet of Islam, and his Companions. In fact, rational argumentation about Islamic doctrines starts with Quran itself, and has been followed up in the utterances of the Muhammad and especially in the sermons of Ali. This despite the fact that their style and approach are different from those of the Muslim theologians.

Though nothing definite can be said about the beginnings of theology among Muslims, what is certain is that discussion of some of the problems, such as the issue of predestination, free will and Divine Justice, became current among Muslims during the first half of the 2nd century of Islam coincides with 8th century. Perhaps the first formal centre of such discussions was the circle of Hasan al-Basri(d.728-29). Later several theological schools have emerged from 8th to 10th century. Mu'tazili theology originated in the 8th century in Basra (Iraq) by Wasil ibn Ata (d.748 A.D.).

Early Islamic philosophy (8th-12th centuries)

See also: Avicennism, Ghazalism, and Averroism

The first period of Islamic philosophy coincides with Islamic Golden Age. During this time pure philosophical thought is usually used Aristotelianism and Neoplatonism thought as its sources. But it also influenced by Islamic thought and culture. Falaturi has shown in his research that how Hellenistic philosophy diverged in the context of Islamic culture. On the other hand Corbin has shown how mystic aspect of Islam, especially Shia affected philosophy. This period begins with Al-Kindi and ends with Averroes (d.1198). On the other hand there were crucial theological debates between Muslim theologians. These discussion also helped to rise of rational debates about religion, especially Islam.

Avicenna is one the most prominent figures of this period. He is a thinker who attempted to redefine the course of Islamic philosophy and channel it into new directions. Avicenna's metaphysical system is built on the ingredients and conceptual building blocks which are largely Aristotelian and Neoplatonic, but the final structure is more than the sum of its parts. In the Islamic Golden Age, due to Avicenna's successful reconciliation between Aristotelianism and Neoplatonism along with Islamic theology, Avicennism eventually became the leading school of early Islamic philosophy by the 12th century. Avicenna had become a central authority on philosophy by then. Although this school was highly criticized by Muslim theologians, such as Al-Ghazali, philosophers, like Averroes, and Sufis, Avicenna's writings spread like fire and continued until today to form the basis of philosophic education in the Islamic world. For to the extent that the post-Averroistic tradition remained philosophic, especially in the eastern Islamic lands, it moved in the directions charted for it by Avicenna in the investigation of both theoretical and practical sciences.

12th-16th centuries

Mystical philosophy

After the death of Averroes, Islamic philosophy in the Peripatetic style went out of fashion in the Arab part of Muslim world, until the 19th century. Mystical philosophy, by contrast, continued to flourish, although no thinkers matched the creativity of Ibn Arabi or Ibn Sab‘in. In the Persian-speaking part, Islamic philosophy has continued to follow a largely Illuminationist curriculum, which is introduced by Suhrawardi (1155-1191).

Transcendent Theosophy

The third period, according to Corbin, begins in the 16th century after emergence of Safavid dynasty in Persia. The most prominent figure of this period is Mulla Sadra who introduced Transcendent Theosophy as a critical philosophy which brought together Peripatetic, Illuminationist and gnostic philosophy along with Ash'ari and Twelvers theology, the source of which lay in the Islamic revelation and the mystical experience of reality as existence. This philosophy becomes dominant form of philosophy in Iran since 19th century. Shah Wali Allah extended Suhrawardi school of thought to the Indian subcontinent. Transcendent theosophy is considered an early school of existentialism, predating Western existentialism by several centuries.

Chinese philosophy

Mid-Imperial Chinese philosophy is primarily defined by the development of Neo-Confucianism. During the Tang Dynasty, Buddhism from Nepal also became a prominent philosophical and religious discipline. (It should be noted that philosophy and religion were clearly distinguished in the West, whilst these concepts were more continuous in the East due to, for example, the philosophical concepts of Buddhism.)

Neo-Confucianism is a philosophical movement that advocated a more rationalist and secular form of Confucianism by rejecting superstitious and mystical elements of Daoism and Buddhism that had influenced Confucianism during and after the Han Dynasty. Although the Neo-Confucianists were critical of Daoism and Buddhism, the two did have an influence on the philosophy, and the Neo-Confucianists borrowed terms and concepts from both. However, unlike the Buddhists and Daoists, who saw metaphysics as a catalyst for spiritual development, religious enlightenment, and immortality, the Neo-Confucianists used metaphysics as a guide for developing a rationalist ethical philosophy.

Neo-Confucianism has its origins in the Tang Dynasty; the Confucianist scholars Han Yu and Li Ao are seen as forbears of the Neo-Confucianists of the Song Dynasty. The Song Dynasty philosopher Zhou Dunyi is seen as the first true "pioneer" of Neo-Confucianism, using Daoist metaphysics as a framework for his ethical philosophy.

Japan and Korea

Elsewhere in East Asia, Japanese philosophy began to develop as indigenous Shinto beliefs fused with Buddhism, Confucianism and other schools of Chinese philosophy and Indian philosophy. Similar to Japan, in Korean philosophy the emotional content of Shamanism was integrated into the Neo-Confucianism imported from China.

Christian European philosophy

See also: Christian philosophy

Medieval philosophy

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St. Thomas Aquinas

Medieval philosophy is the philosophy of Western Europe and the Middle East during the Middle Ages, roughly extending from the Christianization of the Roman Empire until the Renaissance. Medieval philosophy is defined partly by the rediscovery and further development of classical Greek and Hellenistic philosophy, and partly by the need to address theological problems and to integrate the then widespread sacred doctrines of Abrahamic religion (Islam, Judaism, and Christianity) with secular learning.

The history of western European medieval philosophy is traditionally divided into two main periods: the period in the Latin West following the Early Middle Ages until the 12th century, when the works of Aristotle and Plato were preserved and cultivated; and the "golden age"^{[citation needed]} of the 12th, 13th and 14th centuries in the Latin West, which witnessed the culmination of the recovery of ancient philosophy, and significant developments in the field of philosophy of religion, logic and metaphysics.

The medieval era was disparagingly treated by the Renaissance humanists, who saw it as a barbaric "middle" period between the classical age of Greek and Roman culture, and the "rebirth" or renaissance of classical culture. Yet this period of nearly a thousand years was the longest period of philosophical development in Europe, and possibly the richest. Jorge Gracia has argued that "in intensity, sophistication, and achievement, the philosophical flowering in the thirteenth century could be rightly said to rival the golden age of Greek philosophy in the fourth century B.C."

Some problems discussed throughout this period are the relation of faith to reason, the existence and unity of God, the object of theology and metaphysics, the problems of knowledge, of universals, and of individuation.

Philosophers from the Middle Ages include the Christian philosophers Augustine of Hippo, Boethius, Anselm, Gilbert of Poitiers, Peter Abelard, Roger Bacon, Bonaventure, Thomas Aquinas, Duns Scotus, William of Ockham and Jean Buridan; the Jewish philosophers Maimonides and Gersonides; and the Muslim philosophers Alkindus, Alfarabi, Alhazen, Avicenna, Algazel, Avempace, Abubacer, Ibn Khaldūn, and Averroes. The medieval tradition of Scholasticism continued to flourish as late as the 17th century, in figures such as Francisco Suarez and John of St. Thomas.

Aquinas, father of Thomism, was immensely influential in Catholic Europe, placed a great emphasis on reason and argumentation, and was one of the first to use the new translation of Aristotle's metaphysical and epistemological writing. His work was a significant departure from the Neoplatonic and Augustinian thinking that had dominated much of early Scholasticism.

Renaissance philosophy

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Giordano Bruno

The Renaissance ("rebirth") was a period of transition between the Middle Ages and modern thought, in which the recovery of classical texts helped shift philosophical interests away from technical studies in logic, metaphysics, and theology towards eclectic inquiries into morality, philology, and mysticism. The study of the classics and the humane arts generally, such as history and literature, enjoyed a scholarly interest hitherto unknown in Christendom, a tendency referred to as humanism. Displacing the medieval interest in metaphysics and logic, the humanists followed Petrarch in making man and his virtues the focus of philosophy.

The study of classical philosophy also developed in two new ways. On the one hand, the study of Aristotle was changed through the influence of Averroism. The disagreements between these Averroist Aristotelians, and more orthodox catholic Aristotelians such as Albertus Magnus and Thomas Aquinas eventually contributed to the development of a "humanist Aristotelianism" developed in the Renaissance, as exemplified in the thought of Pietro Pomponazzi and Giacomo Zabarella. Secondly, as an alternative to Aristotle, the study of Plato and the Neoplatonists became common. This was assisted by the rediscovery of works which had not been well known previously in Western Europe. Notable Renaissance Platonists include Nicholas of Cusa, and later Marsilio Ficino and Giovanni Pico della Mirandola.

The Renaissance also renewed interest in anti-Aristotelian theories of nature considered as an organic, living whole comprehensible independently of theology, as in the work of Nicholas of Cusa, Nicholas Copernicus, Giordano Bruno, Telesius, and Tommaso Campanella. Such movements in natural philosophy dovetailed with a revival of interest in occultism, magic, hermeticism, and astrology, which were thought to yield hidden ways of knowing and mastering nature (e.g., in Marsilio Ficino and Giovanni Pico della Mirandola).

These new movements in philosophy developed contemporaneously with larger religious and political transformations in Europe: the Reformation and the decline of feudalism. Though the theologians of the Protestant Reformation showed little direct interest in philosophy, their destruction of the traditional foundations of theological and intellectual authority harmonized with a revival of fideism and skepticism in thinkers such as Erasmus, Montaigne, and Francisco Sanches. Meanwhile, the gradual centralization of political power in nation-states was echoed by the emergence of secular political philosophies, as in the works of Niccolò Machiavelli (often described as the first modern political thinker, or a key turning point towards modern political thinking), Thomas More, Erasmus, Justus Lipsius, Jean Bodin, and Hugo Grotius.

17th–20th centuries

Early modern philosophy

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John Locke

Chronologically, the early modern era of Western philosophy is usually identified with the 17th and 18th centuries, with the 18th century often being referred to as the Enlightenment. Modern philosophy is distinguished from its predecessors by its increasing independence from traditional authorities such as the Church, academia, and Aristotelianism; a new focus on the foundations of knowledge and metaphysical system-building; and the emergence of modern physics out of natural philosophy. Other central topics of philosophy in this period include the nature of the mind and its relation to the body, the implications of the new natural sciences for traditional theological topics such as free will and God, and the emergence of a secular basis for moral and political philosophy. These trends first distinctively coalesce in Francis Bacon's call for a new, empirical program for expanding knowledge, and soon found massively influential form in the mechanical physics and rationalist metaphysics of René Descartes. Thomas Hobbes was the first to apply this methodology systematically to political philosophy and is the originator of modern political philosophy, including the modern theory of a "social contract". The academic canon of early modern philosophy generally includes Descartes, Spinoza, Leibniz, Locke, Berkeley, Hume, and Kant, though influential contributions to philosophy were made by many thinkers in this period, such as Galileo Galilei, Pierre Gassendi, Blaise Pascal, Nicolas Malebranche, Isaac Newton, Christian Wolff, Montesquieu, Pierre Bayle, Thomas Reid, Jean d'Alembert, and Adam Smith. Jean-Jacques Rousseau was a seminal figure in initiating reaction against the Enlightenment. The approximate end of the early modern period is most often identified with Immanuel Kant's systematic attempt to limit metaphysics, justify scientific knowledge, and reconcile both of these with morality and freedom.

19th-century philosophy

Later modern philosophy is usually considered to begin after the philosophy of Immanuel Kant at the beginning of the 19th century. German philosophy exercised broad influence in this century, owing in part to the dominance of the German university system. German idealists, such as Johann Gottlieb Fichte, Georg Wilhelm Friedrich Hegel, and Friedrich Wilhelm Joseph Schelling, transformed the work of Kant by maintaining that the world is constituted by a rational or mind-like process, and as such is entirely knowable. Arthur Schopenhauer's identification of this world-constituting process as an irrational will to live influenced later 19th- and early 20th-century thinking, such as the work of Friedrich Nietzsche and Sigmund Freud.

After Hegel's death in 1831, 19th-century philosophy largely turned against idealism in favor of varieties of philosophical naturalism, such as the positivism of Auguste Comte, the empiricism of John Stuart Mill, and the materialism of Karl Marx. Logic began a period of its most significant advances since the inception of the discipline, as increasing mathematical precision opened entire fields of inference to formalization in the work of George Boole and Gottlob Frege. Other philosophers who initiated lines of thought that would continue to shape philosophy into the 20th century include:

• Gottlob Frege and Henry Sidgwick, whose work in logic and ethics, respectively, provided the tools for early analytic philosophy.
• Charles Sanders Peirce and William James, who founded pragmatism.
• Søren Kierkegaard and Friedrich Nietzsche, who laid the groundwork for existentialism and post-structuralism.

20th-century philosophy

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Bertrand Russell

Within the last century, philosophy has increasingly become a professional discipline practiced within universities, like other academic disciplines. Accordingly, it has become less general and more specialized. In the view of one prominent recent historian: "Philosophy has become a highly organized discipline, done by specialists primarily for other specialists. The number of philosophers has exploded, the volume of publication has swelled, and the subfields of serious philosophical investigation have multiplied. Not only is the broad field of philosophy today far too vast to be embraced by one mind, something similar is true even of many highly specialized subfields."

In the English-speaking world, analytic philosophy became the dominant school for much of the 20th century. In the first half of the century, it was a cohesive school, shaped strongly by logical positivism, united by the notion that philosophical problems could and should be solved by attention to logic and language. The pioneering work of Bertrand Russell was a model for the early development of analytic philosophy, moving from a rejection of the idealism dominant in late 19th-century British philosophy to an neo-Humean empiricism, strengthened by the conceptual resources of modern mathematical logic. In the latter half of the 20th century, analytic philosophy diffused into a wide variety of disparate philosophical views, only loosely united by historical lines of influence and a self-identified commitment to clarity and rigor. The post-war transformation of the analytic program led in two broad directions: on one hand, an interest in ordinary language as a way of avoiding or redescribing traditional philosophical problems, and on the other, a more thoroughgoing naturalism that sought to dissolve the puzzles of modern philosophy via the results of the natural sciences (such as cognitive psychology and evolutionary biology). The shift in the work of Ludwig Wittgenstein, from a view congruent with logical positivism to a therapeutic dissolution of traditional philosophy as a linguistic misunderstanding of normal forms of life, was the most influential version of the first direction in analytic philosophy. The later work of Russell and the philosophy of W.V.O. Quine are influential exemplars of the naturalist approach dominant in the second half of the 20th century. But the diversity of analytic philosophy from the 1970s onward defies easy generalization: the naturalism of Quine and his epigoni was in some precincts superseded by a "new metaphysics" of possible worlds, as in the influential work of David Lewis. Recently, the experimental philosophy movement has sought to reappraise philosophical problems through social science research techniques.

On continental Europe, no single school or temperament enjoyed dominance. The flight of the logical positivists from central Europe during the 1930s and 1940s, however, diminished philosophical interest in natural science, and an emphasis on the humanities, broadly construed, figures prominently in what is usually called "continental philosophy". 20th century movements such as phenomenology, existentialism, modern hermeneutics, critical theory, structuralism, and poststructuralism are included within this loose category. The founder of phenomenology, Edmund Husserl, sought to study consciousness as experienced from a first-person perspective, while Martin Heidegger drew on the ideas of Kierkegaard, Nietzsche, and Husserl to propose an unconventional existential approach to ontology.

In the Arab-speaking world Arab nationalist philosophy became the dominant school of thought, involving philosophers such as Michel Aflaq, Zaki al-Arsuzi, Salah al-Din al-Bitar of ba'athism and Sati' al-Husri. These people disregarded much of Marx's research, and were mostly concerned with the individual's spirituality which would, in the fight against imperialism and oppression, lead to a united Arab Nation.

Major traditions

Phenomenology

The early Islamic philosopher Ibn al-Haytham (965-1039) is considered a pioneer of phenomenology, or the study of consciousness from a first-person perspective. He articulated a relationship between the physical and observable world and that of intuition, psychology and mental functions. His theories regarding knowledge and perception, linking the domains of science and religion, led to a philosophy of existence based on the direct observation of reality from the observer's point of view.

Edmund Husserl's phenomenology was an ambitious attempt to lay the foundations for an account of the structure of conscious experience in general. An important part of Husserl's phenomenological project was to show that all conscious acts are directed at or about objective content, a feature that Husserl called intentionality.

In the first part of his two-volume work, the Logical Investigations (1901), he launched an extended attack on psychologism. In the second part, he began to develop the technique of descriptive phenomenology, with the aim of showing how objective judgments are indeed grounded in conscious experience—not, however, in the first-person experience of particular individuals, but in the properties essential to any experiences of the kind in question.

He also attempted to identify the essential properties of any act of meaning. He developed the method further in Ideas (1913) as transcendental phenomenology, proposing to ground actual experience, and thus all fields of human knowledge, in the structure of consciousness of an ideal, or transcendental, ego. Later, he attempted to reconcile his transcendental standpoint with an acknowledgement of the intersubjective life-world in which real individual subjects interact. Husserl published only a few works in his lifetime, which treat phenomenology mainly in abstract methodological terms; but he left an enormous quantity of unpublished concrete analyses.

Husserl's work was immediately influential in Germany, with the foundation of phenomenological schools in Munich and Göttingen. Phenomenology later achieved international fame through the work of such philosophers as Martin Heidegger (formerly Husserl's research assistant), Maurice Merleau-Ponty, and Jean-Paul Sartre. Indeed, through the work of Heidegger and Sartre, Husserl's focus on subjective experience influenced aspects of existentialism.

Existentialism

Existentialism is a term applied to the work of a number of historical philosophers who, despite profound doctrinal differences, shared the belief that philosophical thinking begins with the human subject—not merely the thinking subject, but the acting, feeling, living human individual. In existentialism, the individual's starting point is characterized by what has been called "the existential attitude", or a sense of disorientation and confusion in the face of an apparently meaningless or absurd world. Many existentialists have also regarded traditional systematic or academic philosophy, in both style and content, as too abstract and remote from concrete human experience.

The Persian Islamic philosopher Mulla Sadra's transcendent theosophy in the 16th century has been described as an early example of existentialism, predating Western existentialism by several centuries.

Although they did not use the term, the 19th-century philosophers Søren Kierkegaard and Friedrich Nietzsche are often considered the fathers of modern existentialism. Their influence, however, has extended beyond existentialist thought.

The main target of Kierkegaard's writings was the idealist philosophical system of Hegel which, he thought, ignored or excluded the inner subjective life of living human beings. Kierkegaard, conversely, held that "truth is subjectivity", arguing that what is most important to an actual human being are questions dealing with an individual's inner relationship to existence. In particular, Kierkegaard, a Christian, believed that the truth of religious faith was a subjective question, and one to be wrestled with passionately.

Although Kierkegaard and Nietzsche were among his influences, the extent to which the German philosopher Martin Heidegger should be considered an existentialist is debatable. In Being and Time he presented a method of rooting philosophical explanations in human existence (Dasein) to be analysed in terms of existential categories (existentiale); and this has led many commentators to treat him as an important figure in the existentialist movement. However, in The Letter on Humanism, Heidegger explicitly rejected the existentialism of Jean-Paul Sartre.

Sartre became the best-known proponent of existentialism, exploring it not only in theoretical works such as Being and Nothingness, but also in plays and novels. Sartre, along with Simone de Beauvoir, represented an avowedly atheistic branch of existentialism, which is now more closely associated with their ideas of nausea, contingency, bad faith, and the absurd than with Kierkegaard's spiritual angst. Nevertheless, the focus on the individual human being, responsible before the universe for the authenticity of his or her existence, is common to all these thinkers.

Existence precedes essence

A central proposition of existentialism is that existence precedes essence, which means that the actual life of the individual is what constitutes what could be called his or her "essence" instead of there being a predetermined essence that defines what it is to be a human. Thus, the human being - through his consciousness - creates his own values and determines a meaning to his life. Although it was Sartre who explicitly coined the phrase, similar notions can be found in the thought of many existentialist philosophers, from Mulla Sadra, to Kierkegaard, to Heidegger.

The idea can be found in the works of Averroes in the 12th century, Mulla Sadra in the 17th century, Søren Kierkegaard in the 19th century, and was later more explicitly formulated by French philosopher Jean-Paul Sartre in the 20th century. His close confidant, Simone de Beauvoir also uses this concept in her feminist existentialism to develop the idea that "one is not born a woman, but becomes one". In Islamic philosophy, whereas previous methods of philosophical thought held that "essence precedes existence", a concept which dates back to at least Avicenna and Shahab al-Din Suhrawardi in the Islamic tradition. Mulla Sadra substituted a metaphysics of existence for the traditional metaphysics of essences, giving priority ab initio to existence over quiddity.

In Western philosophy, Sartre flips this around arguing that for humans, existence precedes essence. The three-word formula originates with Sartre in his 1945 lecture "Existentialism Is a Humanism" (though antecedent notions can be found in Heidegger's Being and Time).

Structuralism and post-structuralism

Structuralism originated from the 14th century Arab scholar Ibn Khaldun. According to the historian, Professor Stephen Frederic Dale: [5]

Ibn Khaldun developed what modern scholars would identify as a structuralist methodology, using classical logic to identify enduring socioeconomic realities underlying cultural phenomena and ephemeral events, what he describes as the “general conditions of regions, races and periods that constitute the historian's foundation.”

Later inaugurated by the linguist Ferdinand de Saussure in the 20th century, structuralism sought to clarify systems of signs through analyzing the discourses they both limit and make possible. Saussure conceived of the sign as being delimited by all the other signs in the system, and ideas as being incapable of existence prior to linguistic structure, which articulates thought. This led continental thought away from humanism, and toward what was termed the decentering of man: language is no longer spoken by man to express a true inner self, but language speaks man.

Structuralism sought the province of a hard science, but its positivism soon came under fire by poststructuralism, a wide field of thinkers, some of whom were once themselves structuralists, but later came to criticize it. Structuralists believed they could analyze systems from an external, objective standing, for example, but the poststructuralists argued that this is incorrect, that one cannot transcend structures and thus analysis is itself determined by what it examines, while the distinction between the signifier and signified was treated as crystalline by structuralists, poststructuralists asserted that every attempt to grasp the signified results in more signifiers, so meaning is always in a state of being deferred, making an ultimate interpretation impossible.

Structuralism came to dominate continental philosophy throughout the 1960s and early 1970s, encompassing thinkers as diverse as Claude Lévi-Strauss, Roland Barthes and Jacques Lacan. Post-structuralism came to predominate over the 1970s onwards, including thinkers such as Michel Foucault, Jacques Derrida, Gilles Deleuze and even Roland Barthes; it incorporated a critique of structuralism's limitations.

German idealism

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Immanuel Kant

Forms of idealism were prevalent in philosophy from the 18th century to the early 20th century. Transcendental idealism, advocated by Immanuel Kant, is the view that there are limits on what can be understood, since there is much that cannot be brought under the conditions of objective judgment. Kant wrote his Critique of Pure Reason (1781–1787) in an attempt to reconcile the conflicting approaches of rationalism and empiricism, and to establish a new groundwork for studying metaphysics. Kant's intention with this work was to look at what we know and then consider what must be true about it, as a logical consequence of the way we know it. One major theme was that there are fundamental features of reality that escape our direct knowledge because of the natural limits of the human faculties. Although Kant held that objective knowledge of the world required the mind to impose a conceptual or categorical framework on the stream of pure sensory data—a framework including space and time themselves—he maintained that things-in-themselves existed independently of our perceptions and judgments; he was therefore not an idealist in any simple sense. Indeed, Kant's account of things-in-themselves is both controversial and highly complex. Continuing his work, Johann Gottlieb Fichte and Friedrich Schelling dispensed with belief in the independent existence of the world, and created a thoroughgoing idealist philosophy.

The most notable work of this German idealism was G. W. F. Hegel's Phenomenology of Spirit, of 1807. Hegel admitted his ideas were not new, but that all the previous philosophies had been incomplete. His goal was to correctly finish their job. Hegel asserts that the twin aims of philosophy are to account for the contradictions apparent in human experience (which arise, for instance, out of the supposed contradictions between "being" and "not being"), and also simultaneously to resolve and preserve these contradictions by showing their compatibility at a higher level of examination ("being" and "not being" are resolved with "becoming"). This program of acceptance and reconciliation of contradictions is known as the "Hegelian dialectic". Philosophers influenced by Hegel include Ludwig Andreas Feuerbach, who coined the term projection as pertaining to our inability to recognize anything in the external world without projecting qualities of ourselves upon those things; Karl Marx; Friedrich Engels; and the British idealists, notably T. H. Green, J. M. E. McTaggart and F. H. Bradley.

Few 20th century philosophers have embraced idealism. However, quite a few have embraced Hegelian dialectic. Immanuel Kant's "Copernican Turn" also remains an important philosophical concept today.

Pragmatism

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William James

Pragmatism was founded in the spirit of finding a scientific concept of truth that does not depend on personal insight (revelation) or reference to some metaphysical realm. The meaning or purport of a statement should be judged by the effect its acceptance would have on practice. Truth should be seen as correspondence, independently of actual opinions, to the real and, pragmatically, as that opinion which inquiry taken far enough would ultimately reach. For Charles Sanders Peirce these were principles of the inquirer's self-regulation, implied by the idea and hope that inquiry is not generally fruitless. The details of how these principles should be interpreted have been subject to discussion since Peirce first conceived them. Peirce's maxim of pragmatism is as follows: "Consider what effects, which might conceivably have practical bearings, we conceive the object of our conception to have. Then, our conception of these effects is the whole of our conception of the object." Like postmodern neo-pragmatist Richard Rorty, many are convinced that pragmatism asserts that the truth of beliefs does not consist in their correspondence with reality, but in their usefulness and efficacy.

The late 19th-century American philosophers Charles Sanders Peirce and William James were its co-founders, and it was later developed by John Dewey as instrumentalism. Since the usefulness of any belief at any time might be contingent on circumstance, Peirce and James conceptualised final truth as something only established by the future, final settlement of all opinion. Critics have accused pragmatism falling victim to a simple fallacy: because something that is true proves useful, that usefulness is the basis for its truth. Thinkers in the pragmatist tradition have included John Dewey, George Santayana, W. V. O. Quine and C. I. Lewis. Pragmatism has more recently been taken in new directions by Richard Rorty, John Lachs, Donald Davidson, Susan Haack, and Hilary Putnam.

The analytic tradition

The term analytic philosophy roughly designates a group of philosophical methods that stress detailed argumentation, attention to semantics, use of classical logic and non-classical logics and clarity of meaning above all other criteria. Some have held that philosophical problems arise through misuse of language or because of misunderstandings of the logic of our language, while some maintain that there are genuine philosophical problems and that philosophy is continuous with science. Michael Dummett in his Origins of Analytical Philosophy makes the case for counting Gottlob Frege's The Foundations of Arithmetic as the first analytic work, on the grounds that in that book Frege took the linguistic turn, analyzing philosophical problems through language. Bertrand Russell and G.E. Moore are also often counted as founders of analytic philosophy, beginning with their rejection of British idealism, their defense of realism and the emphasis they laid on the legitimacy of analysis. Russell's classic works The Principles of Mathematics, On Denoting and Principia Mathematica with Alfred North Whitehead, aside from greatly promoting the use of mathematical logic in philosophy, set the ground for much of the research program in the early stages of the analytic tradition, emphasizing such problems as: the reference of proper names, whether 'existence' is a property, the nature of propositions, the analysis of definite descriptions, the discussions on the foundations of mathematics; as well as exploring issues of ontological commitment and even metaphysical problems regarding time, the nature of matter, mind, persistence and change, which Russell tackled often with the aid of mathematical logic. Russell and Moore's philosophy, in the beginning of the 20th century, developed as a critique of Hegel and his British followers in particular, and of grand systems of speculative philosophy in general, though by no means all analytic philosophers reject the philosophy of Hegel (see Charles Taylor) nor speculative philosophy. Some schools in the group include logical positivism, and ordinary language both markedly influenced by Russell and Wittgenstein's development of Logical Atomism the former positively and the latter negatively.

In 1921, Ludwig Wittgenstein, who studied under Russell at Cambridge, published his Tractatus Logico-Philosophicus, which gave a rigidly "logical" account of linguistic and philosophical issues. At the time, he understood most of the problems of philosophy as mere puzzles of language, which could be solved by investigating and then minding the logical structure of language. Years later, he reversed a number of the positions he set out in the Tractatus, in for example his second major work, Philosophical Investigations (1953). Investigations was influential in the development of "ordinary language philosophy," which was promoted by Gilbert Ryle, J.L. Austin, and a few others. In the United States, meanwhile, the philosophy of W.V.O. Quine was having a major influence, with such classics as Two Dogmas of Empiricism. In that paper Quine criticizes the distinction between analytic and synthetic statements, arguing that a clear conception of analyticity is unattainable. He argued for holism, the thesis that language, including scientific language, is a set of interconnected sentences, none of which can be verified on its own, rather, the sentences in the language depend on each other for their meaning and truth conditions. A consequence of Quine's approach is that language as a whole has only a thin relation to experience. Some sentences that refer directly to experience might be modified by sense impressions, but as the whole of language is theory-laden, for the whole language to be modified, more than this is required. However, most of the linguistic structure can in principle be revised, even logic, in order to better model the world. Notable students of Quine include Donald Davidson and Daniel Dennett. The former devised a program for giving a semantics to natural language and thereby answer the philosophical conundrum "what is meaning?". A crucial part of the program was the use of Alfred Tarski's semantic theory of truth. Dummett, among others, argued that truth conditions should be dispensed within the theory of meaning, and replaced by assertibility conditions. Some propositions, on this view, are neither true nor false, and thus such a theory of meaning entails a rejection of the law of the excluded middle. This, for Dummett, entails antirealism, as Russell himself pointed out in his An Inquiry into Meaning and Truth.

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John Rawls

By the 1970s there was a renewed interest in many traditional philosophical problems by the younger generations of analytic philosophers. David Lewis, Saul Kripke, Derek Parfit and others took an interest in traditional metaphysical problems, which they began exploring by the use of logic and philosophy of language. Among those problems some distinguished ones were: free will, essentialism, the nature of personal identity, identity over time, the nature of the mind, the nature of causal laws, space-time, the properties of material beings, modality, etc. In those universities where analytic philosophy has spread, these problems are still being discussed passionately. Analytic philosophers are also interested in the methodology of analytic philosophy itself, with Timothy Williamson, Wykeham Professor of Logic at Oxford, publishing recently a book entitled The Philosophy of Philosophy. Some influential figures in contemporary analytic philosophy are: Timothy Williamson, David Lewis, John Searle, Thomas Nagel, Hilary Putnam, Michael Dummett, Peter van Inwagen and Saul Kripke. Analytic philosophy has sometimes been accused of not contributing to the political debate or to traditional questions in aesthetics. However, with the appearance of A Theory of Justice by John Rawls and Anarchy, State and Utopia by Robert Nozick, analytic political philosophy acquired respectability. Analytic philosophers have also shown depth in their investigations of aesthetics, with Roger Scruton, Nelson Goodman, Arthur Danto and others developing the subject to its current shape.

Applied philosophy

The ideas conceived by a society have profound repercussions on what actions the society performs. The applied study of philosophy yields applications such as those in ethics—applied ethics in particular—and political philosophy. The political and economic philosophies of Confucius, Sun Zi, Chanakya, Ibn Khaldun, Ibn Rushd, Ibn Taimiyyah, Niccolò Machiavelli, Gottfried Wilhelm Leibniz, John Locke, Jean-Jacques Rousseau, Adam Smith, Karl Marx, John Stuart Mill, Mahatma Gandhi, Martin Luther King Jr., and others—all of these have been used to shape and justify governments and their actions.

In the field of philosophy of education, progressive education as championed by John Dewey has had a profound impact on educational practices in the United States in the 20th century. Descendants of this movement include the current efforts in philosophy for children, which are part of philosophy education. Carl von Clausewitz's political philosophy of war has had a profound effect on statecraft, international politics, and military strategy in the 20th century, especially in the years around World War II. Logic has become crucially important in mathematics, linguistics, psychology, computer science, and computer engineering.

Other important applications can be found in epistemology, which aid in understanding the requisites for knowledge, sound evidence, and justified belief (important in law, economics, decision theory, and a number of other disciplines). The philosophy of science discusses the underpinnings of the scientific method and has affected the nature of scientific investigation and argumentation. As such, philosophy has fundamental implications for science as a whole. For example, the strictly empirical approach of Skinner's behaviorism affected for decades the approach of the American psychological establishment. Deep ecology and animal rights examine the moral situation of humans as occupants of a world that has non-human occupants to consider also. Aesthetics can help to interpret discussions of music, literature, the plastic arts, and the whole artistic dimension of life. In general, the various philosophies strive to provide practical activities with a deeper understanding of the theoretical or conceptual underpinnings of their fields.

Often philosophy is seen as an investigation into an area not sufficiently well understood to be its own branch of knowledge. For example, what were once philosophical pursuits have evolved into the modern day fields such as psychology, sociology, linguistics, and economics.

See also

• List of important publications in philosophy
• List of years in philosophy
• List of philosophers
• List of philosophy journals
• List of unsolved problems in philosophy
• Social theory

Further reading

• Bullock, Alan, R. B. Woodings, and John Cumming, eds. The Fontana Dictionary of Modern Thinkers, in series, Fontana Original[s]. Hammersmith, Eng.: Fontana Press, 1992, cop. 1983. xxv, 867 p. ISBN 978-0-00-636965-3
• Bullock, Alan, and Oliver Stallybrass, jt. eds. The Harper Dictionary of Modern Thought. New York: Harper & Row, 1977. xix, 684 p. N.B.: "First published in England under the title, The Fontana Dictionary of Modern Thought." ISBN 978-0-06-010578-5
• Julia, Didier. Dictionnaire de la philosophie. Responsible éditorial, Emmanuel de Waresquiel; secretariat de rédaction, Joelle Narjollet. [Éd. rev.]. Paris: Larousse, 2006. 301, [1] p. + xvi p. of ill. ISBN 978-2-03-583309-9
• Reese, W. L. Dictionary of Philosophy and Religion: Eastern and Western Thought. Atlantic Highlands, N.J.: Humanities Press, 1980. iv, 644 p. ISBN 978-0-391-00688-1

Introductions

• Appiah, Kwame Anthony. Thinking it Through  – An Introduction to Contemporary Philosophy, 2003, ISBN 978-0-19-513458-2
• Blumenau, Ralph. Philosophy and Living. ISBN 978-0-907845-33-1
• Craig, Edward. Philosophy: A Very Short Introduction. ISBN 978-0-19-285421-6
• Curley, Edwin, A Spinoza Reader, Princeton, 1994, ISBN 978-0-691-00067-1
• Durant, Will, Story of Philosophy: The Lives and Opinions of the World's Greatest Philosophers, Pocket, 1991, ISBN 978-0-671-73916-4
• Harrison-Barbet, Anthony, Mastering Philosophy. ISBN 978-0-333-69343-8
• Higgins, Kathleen M. and Solomon, Robert C. A Short History of Philosophy. ISBN 978-0-19-510196-6
• Philosophy Now magazine
• Russell, Bertrand. The Problems of Philosophy. ISBN 978-0-19-511552-9
• Sinclair, Alistair J. What is Philosophy? An Introduction, 2008, ISBN 978-1-903765-94-4
• Sober, Elliott. (2001). Core Questions in Philosophy: A Text with Readings. Upper Saddle River, Prentice Hall. ISBN 978-0-13-189869-1
• Solomon, Robert C. Big Questions: A Short Introduction to Philosophy. ISBN 978-0-534-16708-0
• Warburton, Nigel. Philosophy: The Basics. ISBN 978-0-415-14694-4
• Think: philosophy for everyone Lively and accessible articles written by philosophers pre-eminent in their fields, for a broad audience. Free articles are available online.
• Gerald Rochelle [6] Doing Philosophy, 2012, ISBN 978-1-78046-004-8

Topical introductions

• Copleston, Frederick. Philosophy in Russia: From Herzen to Lenin and Berdyaev. ISBN 978-0-268-01569-5
• Critchley, Simon. Continental Philosophy: A Very Short Introduction. ISBN 978-0-19-285359-2
• Hamilton, Sue. Indian Philosophy: a Very Short Introduction. ISBN 978-0-19-285374-5
• Harwood, Sterling, ed., Business as Ethical and Business as Usual (Belmont, CA: Wadsworth Publishing Co., 2000); www.sterlingharwood.com
• Imbo, Samuel Oluoch. '3'An Introduction to African Philosophy. ISBN 978-0-8476-8841-8
• Knight, Kelvin. Aristotelian Philosophy: Ethics and Politics from Aristotle to MacIntyre. ISBN 978-0-7456-1977-4
• Kupperman, Joel J. Classic Asian Philosophy: A Guide to the Essential Texts. ISBN 978-0-19-513335-6
• Leaman, Oliver. A Brief Introduction to Islamic Philosophy. ISBN 978-0-7456-1960-6
• Lee, Joe and Powell, Jim. Eastern Philosophy For Beginners. ISBN 978-0-86316-282-4
• Nagel, Thomas. What Does It All Mean? A Very Short Introduction to Philosophy. ISBN 978-0-19-505292-3
• Scruton, Roger. A Short History of Modern Philosophy. ISBN 978-0-415-26763-2
• Smart, Ninian. World Philosophies. ISBN 978-0-415-22852-7
• Tarnas, Richard. The Passion of the Western Mind: Understanding the Ideas That Have Shaped Our World View. ISBN 978-0-345-36809-6

Anthologies

• Classics of Philosophy (Vols. 1 & 2, 2nd edition) by Louis P. Pojman
• Classics of Philosophy: The 20th Century (Vol. 3) by Louis P. Pojman
• The English Philosophers from Bacon to Mill by Edwin Arthur
• European Philosophers from Descartes to Nietzsche by Monroe Beardsley
• Contemporary Analytic Philosophy: Core Readings by James Baillie
• Existentialism: Basic Writings (Second Edition) by Charles Guignon, Derk Pereboom
• The Phenomenology Reader by Dermot Moran, Timothy Mooney
• Medieval Islamic Philosophical Writings edited by Muhammad Ali Khalidi
• A Source Book in Indian Philosophy by Sarvepalli Radhakrishnan, Charles A. Moore
• A Source Book in Chinese Philosophy by Wing-tsit Chan
• Kim, J. and Ernest Sosa, Ed. (1999). Metaphysics: An Anthology. Blackwell Philosophy Anthologies. Oxford, Blackwell Publishers Ltd.
• The Oxford Handbook of Free Will (2004) edited by Robert Kane
• Husserl, Edmund and Donn Welton (1999). The Essential Husserl: Basic Writings in Transcendental Phenomenology, Indiana University Press. ISBN 978-0-253-21273-3
• Cottingham, John. Western Philosophy: An Anthology. 2nd ed. Malden, MA: Blackwell Pub., 2008. Print. Blackwell Philosophy Anthologies.

Reference works

• A Sourcebook of Chinese Philosophy by Chan, Wing-tsit.
• Essentials of Neo-Confucianism: Eight Major Philosophers of the Song and Ming Periods by Huang, Siu-chi
• The Oxford Companion to Philosophy edited by Ted Honderich
• The Cambridge Dictionary of Philosophy by Robert Audi
• The Routledge Encyclopedia of Philosophy (10 vols.) edited by Edward Craig, Luciano Floridi (available online by subscription); or
• The Concise Routledge Encyclopedia of Philosophy edited by Edward Craig (an abridgement)
• Encyclopedia of Philosophy (8 vols.) edited by Paul Edwards; in 1996, a ninth supplemental volume appeared that updated the classic 1967 encyclopedia.
• International Directory of Philosophy and Philosophers. Charlottesville, Philosophy Documentation Center.
• Directory of American Philosophers. Charlottesville, Philosophy Documentation Center.
• Routledge History of Philosophy (10 vols.) edited by John Marenbon
• History of Philosophy (9 vols.) by Frederick Copleston
• A History of Western Philosophy (5 vols.) by W. T. Jones
• History of Italian Philosophy (2 vols.) by Eugenio Garin. Translated from Italian and Edited by Giorgio Pinton. Introduction by Leon Pompa.
• Encyclopaedia of Indian Philosophies (8 vols.), edited by Karl H. Potter et al. (first 6 volumes out of print)
• Indian Philosophy (2 vols.) by Sarvepalli Radhakrishnan
• A History of Indian Philosophy (5 vols.) by Surendranath Dasgupta
• History of Chinese Philosophy (2 vols.) by Fung Yu-lan, Derk Bodde
• Instructions for Practical Living and Other Neo-Confucian Writings by Wang Yang-ming by Chan, Wing-tsit
• Encyclopedia of Chinese Philosophy edited by Antonio S. Cua
• Encyclopedia of Eastern Philosophy and Religion by Ingrid Fischer-Schreiber, Franz-Karl Ehrhard, Kurt Friedrichs
• Companion Encyclopedia of Asian Philosophy by Brian Carr, Indira Mahalingam
• A Concise Dictionary of Indian Philosophy: Sanskrit Terms Defined in English by John A. Grimes
• History of Islamic Philosophy edited by Seyyed Hossein Nasr, Oliver Leaman
• History of Jewish Philosophy edited by Daniel H. Frank, Oliver Leaman
• A History of Russian Philosophy: From the Tenth to the Twentieth Centuries by Valerii Aleksandrovich Kuvakin
• Ayer, A.J. et al., Ed. (1994) A Dictionary of Philosophical Quotations. Blackwell Reference Oxford. Oxford, Basil Blackwell Ltd.
• Blackburn, S., Ed. (1996)The Oxford Dictionary of Philosophy. Oxford, Oxford University Press.
• Mauter, T., Ed. The Penguin Dictionary of Philosophy. London, Penguin Books.
• Runes, D., Ed. (1942). The Dictionary of Philosophy. New York, The Philosophical Library, Inc.
• Angeles, P.A., Ed. (1992). The Harper Collins Dictionary of Philosophy. New York, Harper Perennial.
• Bunnin, N. et al., Ed. (1996) The Blackwell Companion to Philosophy. Blackwell Companions to Philosophy. Oxford, Blackwell Publishers Ltd.
• Hoffman, Eric, Ed. (1997) Guidebook for Publishing Philosophy. Charlottesville, Philosophy Documentation Center.
• Popkin, R.H. (1999). The Columbia History of Western Philosophy. New York, Columbia University Press.

External links

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• PhilPapers - a comprehensive directory of online philosophical articles and books by academic philosophers
• Philosophy Timeline
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• Western philosophy at the Open Directory Project
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