Pre-Socratics

Alcmaeon: Pythagorean

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Chapter 2

Anacharsis: Scythian

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Chapter 3

Anaxagoras: Astronomer

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Chapter 4

Anaximenes: Thales, Anaximander

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Chapter 7

Diogenes of Apollonia: Anaximenes

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Chapter 32

Euclid of Megara: Parmenides

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Chapter 39

Phaedo: Socrates

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Chapter 59

Pyrrho: Anaxarchus

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Chapter 66

Timon: Stilpo

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Chapter 78