| Ancient Greek schools of philosophy
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| Pre-Socratic
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Anaxagoras • Anaximander • Anaximenes • Democritus • Empedocles • Heraclitus • Leucippus • Melissus • Parmenides • Protagoras • Pythagoras • Thales • Zeno of Elea
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| Socratic
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Antisthenes • Aristippus • Aristotle • Diogenes of Sinope • Euclid of Megara • Phaedo of Elis • Plato • Socrates
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| Hellenistic
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Apollonius of Tyana • Augustine • Epictetus • Epicurus • John Philoponus • Lucretius • Plotinus • Proclus • Pyrrho • Sextus Empiricus • Zeno of Citium
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