Ancient Athenian philosophers

Plato ( ; Greek: , ; born  BC, died 348/347 BC) was an ancient Greek philosopher of Classical Athens who is most commonly considered the foundational thinker of the Western philosophical tradition. An innovator of the literary dialogue and dialectic forms, Plato influenced all the major areas of theoretical philosophy and practical philosophy, and was the founder of the Academy, a philosophical school in Athens where Plato taught the collection of philosophical theories that would later become known as Platonism.

Socrates (; ; – 399 BC) was an ancient Greek philosopher from Classical Athens, perhaps the first Western moral philosopher, and a major inspiration on his student Plato, who largely founded the tradition of Western philosophy. An enigmatic figure, Socrates authored no texts and is known mainly through the posthumous accounts of classical writers, particularly his students Plato and Xenophon. These accounts are written as dialogues, in which Socrates and his interlocutors examine a subject in the style of question and answer; they gave rise to the Socratic dialogue literary genre. Contrad

Xenophon of Athens (; ; 355/354 BC) was a Greek military leader, philosopher, and historian. At the age of 30, he was elected as one of the leaders of the retreating Greek mercenaries, the Ten Thousand, who had been part of Cyrus the Younger's attempt to seize control of the Achaemenid Empire. As the military historian Theodore Ayrault Dodge wrote, "the centuries since have devised nothing to surpass the genius of this warrior".

Antisthenes (; , ; 446 366 BCE) was a Greek philosopher and a pupil of Socrates. Antisthenes first learned rhetoric under Gorgias before becoming an ardent disciple of Socrates. He adopted and developed the ethical side of Socrates' teachings, advocating an ascetic life lived in accordance with virtue. Later writers regarded him as the founder of Cynic philosophy.

Xenocrates (; ; c. 396/5314/3 BC) of Chalcedon was a Greek philosopher, mathematician, and leader (scholarch) of the Platonic Academy from 339/8 to 314/3 BC. His teachings followed those of Plato, which he attempted to define more closely, often with mathematical elements. He distinguished three forms of being: the sensible, the intelligible, and a third compounded of the two, to which correspond respectively, sense, intellect and opinion. He considered unity and duality to be gods which rule the universe, and the soul a self-moving number. God pervades all things, and there are daemonical pow

Critias (; , Kritias; – 403 BC) was an ancient Athenian poet, philosopher and political leader. He is known today for being a student of Socrates, a writer of some regard, and for becoming the leader of the Thirty Tyrants, who ruled Athens for several months after the conclusion of the Peloponnesian War in 404/403.

Speusippus (; ; c. 408 – 339/8 BC) was an ancient Greek philosopher. Speusippus was Plato's nephew by his sister Potone. After Plato's death, c. 348 BC, Speusippus inherited the Academy, near age 60, and remained its head for the next eight years. However, following a stroke, he passed the chair to Xenocrates. Although the successor to Plato in the Academy, Speusippus frequently diverged from Plato's teachings. He rejected Plato's Theory of Forms, and whereas Plato had identified the Good with the ultimate principle, Speusippus maintained that the Good was merely secondary. He also argued that

4th century BC Greek philosopher

Chaerephon (; , Chairephōn; c. 470/460 – 403/399 BCE), of the Athenian deme Sphettus, was an ancient Greek best remembered as a loyal friend and follower of Socrates. He is known only through brief descriptions by classical writers and was "an unusual man by all accounts", though a man of loyal democratic values.

ancient Greek philosopher

philosopher