v. 1. The earlier Presocratics and Pythagoreans.
v. 2. The Presocratic tradition from Parmenides to Democritus.
v. 3. The fifth-century enlightenment.
v. 4. Plato-The man and his dialogues: earlier period.
v. 5. The later Plato and the Academy.
v. 6. Aristotle, an encounter.