Classical Greek philosophers

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.

Stilpo or Stilpon (, Stílpōn; c. 360 – c. 280 BC), in Latin sources also Stilbo or Stilbon, was a Greek philosopher of the Megarian school. He was a contemporary of Theophrastus, Diodorus Cronus, and Crates of Thebes. None of his writings survive, but he is described in the writings of others as being interested in logic and dialectic, and he argued that the universal is fundamentally separated from the individual and concrete. His ethical teachings approached that of the Cynics and Stoics. His most important followers were Pyrrho, the founder of Pyrrhonism, and Zeno of Citium, the founder of

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

4th-century BC Greek philosopher

4th-century BC Greek philosopher

Nausiphanes (; lived c. 325 BC) was an ancient Greek atomist philosopher from Teos.

Monimus (; ; 4th century BC) of Syracuse, Magna Graecia, was a Cynic philosopher, and a notable student of Diogenes.

ancient Greek philosopher

4th-century BC Cyrenaic 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.

Euphantus (; fl. c. 320 BCE) of Olynthus was a philosopher of the Megarian school as well as a historian and tragic poet. He was the disciple of Eubulides of Miletus, and the instructor of Antigonus II Gonatas king of Macedonia. He wrote many tragedies, which were well received at the games. He also wrote a very highly esteemed work, On Kingship (), addressed to Antigonus, and a history of his own times. He lived to a great age.

Clinomachus (; 4th-century BC), was a Megarian philosopher from Thurii, Magna Graecia. He is said by Diogenes Laërtius to have been the first who composed treatises on the fundamental principles of dialectics, and is described as the founder of the Dialectical school. According to the Suda, he was the disciple of Euclid of Megara, and he taught Bryson, the teacher of Pyrrho. He thus lived towards the earlier half of the 4th century BC.

Timycha of Sparta (; early 4th century BC), was a Pythagorean philosopher mentioned by Iamblichus in his Life of Pythagoras:

philosopher

Ichthyas (; fl. 4th-century BCE), the son of Metallus, was a Greek philosopher and a disciple and successor of Euclid of Megara in the Megarian school. He was a colleague of Thrasymachus of Corinth in the school. Ichthyas is described as a man of great eminence, and Diogenes of Sinope is said to have addressed a dialogue to him.