Plato (~428-~348 BC) - One of the greatest and most influential Greek
philosophers, he was a disciple of Socrates and the teacher of Aristotle.
Most of his works are written dialogues, many with Socrates as the main
character. Plato founded a school of philosophy known as the Academy.
Laches (380 BC) - Deals with the question of courage; is it an animal
instinct or a mental accomplishment? The dialogue leads to a confession
of ignorance.