Socrates
Socrates' father was a sculptor, and his mother was a midwife who helped women give birth to children. He may have been a stonemason like his father, and Plato wrote that he served in the Athenian army as a hoplite (heavy infantry). We know he was influenced by an older philosopher, Archelaus, and that he talked with anyone who had interesting ideas in Athens, but beyond that nothing is known.