Aenesidemus of Knossos

100 BCE – 50 BCE

Knossos (Crete)

Greek (Crete) philosopher from Knossos (Crete) who revived Pyrrhonian skepticism through the Ten Modes, suspension of judgment, and anti-dogmatic critique.

Aeschines of Sphettus

425 BCE – 350 BCE

Sphettus (Attica)

Athenian Socratic philosopher whose fragmentary dialogues preserve early non-Platonic Socratic arguments about self-knowledge, virtue, education, wealth, and civic excellence.

Antiphon of Athens

480 BCE – 411 BCE

Rhamnus, Attica

Athenian logographer and sophistic thinker from Rhamnus whose homicide speeches, Tetralogies, and fragments on truth and concord explored law, nature, justice, rhetoric, equality, and political order.

Antisthenes of Athens

445 BCE – 365 BCE

Athens (Attica)

Athenian Socratic philosopher associated with Cynosarges whose ascetic ethics, virtue-sufficiency thesis, critique of luxury and convention, attacks on Platonic Forms, and paradoxes of definition and predication shaped Cynicism, Stoicism, ancient logic, and philosophy of language.

Aristotle

384 BCE – 322 BCE

Stagira, Chalcidice

Greek philosopher from Stagira, student of Plato, tutor of Alexander, and founder of the Lyceum whose logic, metaphysics, psychology, ethics, politics, rhetoric, poetics, biology, and philosophy of science shaped later philosophy.

Clement of Alexandria

150 CE – 215 CE

probably Athens

Greek Christian philosopher and Alexandrian teacher who joined Platonist learning, biblical interpretation, moral formation, and Christian gnosis into an early account of faith perfected by reason.

Crates of Athens

c. 335 BCE – 268/7 BCE

Thria, Attica

Old Academy scholarch from Thria in Attica, remembered as Polemo's close Academic associate and predecessor to Arcesilaus in the Athenian school.

Crito of Alopece

469 BCE – 399 BCE

Alopece, Attica

Athenian friend of Socrates from Alopece, remembered as the prison interlocutor who urged escape and became a reception figure for justice, civic duty, and political obligation.

Democritus of Abdera

460 BCE – 370 BCE

Abdera, Thrace

Presocratic atomist from Abdera whose philosophy explained nature, mind, perception, ethics, language, mathematics, and religion through atoms, void, causal necessity, and measured cheerfulness.

Diogenes of Apollonia

460 BCE – 400 BCE

Apollonia Pontica, Thrace

Presocratic natural philosopher from Apollonia Pontica whose surviving fragments explain cosmos, soul, perception, physiology, and divine intelligence through air.

Epicurus of Samos

341 BCE – 270 BCE

Samos

Greek philosopher from Samos whose Garden school joined atomist physics, a canon of sensation and feeling, and an ethics of pleasure understood as freedom from bodily pain and mental disturbance.

Euclid of Megara

435 BCE – 365 BCE

Megara

Socratic philosopher from Megara who joined Socratic concern for the good to Eleatic unity and founded the Megarian school of dialectical argument.

Eudemus of Rhodes

370 BCE – 300 BCE

Rhodes (island)

Peripatetic philosopher from Rhodes, pupil of Aristotle and companion of Theophrastus, remembered for systematizing Aristotelian logic and physics and for pioneering histories of Greek geometry, arithmetic, and astronomy.

Hermarchus of Mytilene

325 BCE – 250 BCE

Mytilene, Lesbos

Epicurean scholarch from Mytilene, pupil and successor of Epicurus, whose lost works and fragments preserve early Garden arguments on nature, law, justice, mathematics, rival schools, and the critique of fear-based religion.

Hippias of Elis

460 BCE – 400 BCE

Elis, Peloponnese

Elean Greek sophist, polymath, diplomat, and mathematician associated with natural law, encyclopedic learning, memory, language, beauty, Olympic chronology, and the quadratrix.

Leucippus of Abdera

500 BCE – 430 BCE

Abdera, Thrace; birthplace uncertain in ancient sources

Presocratic atomist associated with Abdera whose lost works and ancient testimonia explain nature through atoms, void, motion, and necessity.

Melissus of Samos

500 BCE – 430 BCE

Samos

Samian Presocratic and Eleatic philosopher whose lost treatise argues for one unlimited, changeless being and denies void, motion, generation, and destruction.

Phaedo of Elis

417 BCE – 345 BCE

Elis (Peloponnese)

Socratic philosopher from Elis, witness to Socrates' death, founder of the Elean school, and author of lost Socratic dialogues on dialectic, ethics, character, and philosophical conversation.

Philip of Opus

380 BCE – 330 BCE

Opus (Locris)

Early Academic philosopher of Opus, Plato's Academy, mathematical astronomy, Epinomis, astral theology, Opuntian Locris, and the reported arrangement of Plato's Laws.

Plato

427 BCE – 347 BCE

Athens

Athenian philosopher of Forms, dialectic, recollection, the Good, tripartite soul, philosopher-rule, eros, rhetoric, language, cosmology, theology, the Academy, and the Platonic corpus.

Plutarch of Chaeronea

46 CE – 120 CE

Chaeronea (Boeotia)

Middle Platonist moralist, biographer, and priest of Apollo at Delphi whose Parallel Lives and Moralia join virtue ethics, political counsel, religious Platonism, moral psychology, and literary biography.

Prodicus of Ceos

465 BCE – 395 BCE

Ceos (Kea, island)

Cean sophist of language, semantic precision, synonym distinctions, moral choice, the Choice of Heracles, naturalistic theology, civic rhetoric, and Socrates' reported debt to Prodicus on names.

Protagoras of Abdera

490 BCE – 420 BCE

Abdera, Thrace

Abderite sophist of man-measure relativism, appearances, antilogy, weaker and stronger arguments, orthoepeia, civic virtue, democratic political teaching, On the Gods, and fragmentary testimonial transmission.

Pyrrho of Elis

360 BCE – 270 BCE

Elis, Peloponnese

Greek skeptic from Elis whose transmitted way of life joins epoche, aphasia, ataraxia, appearances, non-assertion, Anaxarchus, eastern travel traditions, Timon, Aenesidemus, Sextus Empiricus, and the Pyrrhonian challenge to dogmatic knowledge.

Pythagoras of Samos

570 BCE – 495 BCE

Samos

Samian founder of the Pythagorean way of life whose testimonial profile joins number metaphysics, harmony, tetractys, metempsychosis, purification, communal discipline, Croton, Samos, mathematics, harmonics, and later ancient reception.

Simon the Shoemaker

470 BCE – 399 BCE

Athens (Attica)

Athenian Socratic shoemaker remembered for workshop conversations, craft ethics, free speech, and a lost one-volume set of shoemaker dialogues.

Socrates

470 BCE – 399 BCE

Alopece, Athens

Ancient Athenian philosopher whose public examination, care of the soul, ethical courage, piety inquiry, and trial shaped the Socratic tradition and classical philosophy.

Speusippus of Athens

408 BCE – 339 BCE

Athens (Attica)

Old Academy philosopher, Plato's nephew, and successor as scholarch, whose lost titles and testimonia join first principles, classification, genera, species, number, soul, ethics, politics, definitions, and Academy succession.

Theophrastus of Eresus

371 BCE – 287 BCE

Eresos, Lesbos

Peripatetic philosopher from Eresos, Aristotle successor at the Lyceum, botanical classifier, natural scientist, logician, rhetorician, character writer, and major doxographical source for earlier Greek philosophy.

Timon of Phlius

320 BCE – 230 BCE

Phlius (Peloponnese)

Greek Pyrrhonist philosopher and satirical poet from Phlius whose Silloi, Indalmoi, and prose works preserved Pyrrho's skeptical ideal while attacking dogmatic philosophers.

Xenophon of Athens

430 BCE – 354 BCE

Athens, Attica; Erchia deme tradition noted

Cistercian monk, abbot of Socratic, and medieval Christian philosopher-theologian whose theology of love, humility, grace, free choice, mystical ascent, monastic ethics, scriptural exegesis, and ecclesial counsel shaped scholastic, monastic, and political theology.

Zeno of Citium

334 BCE – 262 BCE

Citium / Kition, Cyprus; Greek city with Phoenician colony context

Cistercian monk, abbot of Stoic, and medieval Christian philosopher-theologian whose theology of love, humility, grace, free choice, mystical ascent, monastic ethics, scriptural exegesis, and ecclesial counsel shaped scholastic, monastic, and political theology.