Free will in antiquity
In Plato's Gorgias (and in the Protagoras 345c4-e6), Socrates argues that no one does wrong willingly, one of the most famous doctrines to be associated with him. When framed in modern (Western) terms, the implication is that it is ignorance, rather that free individual agency, that is responsible for morally wrong actions.
Apology (Plato)
Having addressed the social prejudices against him, Socrates addresses the first accusation — the moral corruption of Athenian youth — by accusing his accuser, Meletus, of being indifferent to the persons and things about which he professes to care. Whilst interrogating Meletus, Socrates says that no one would intentionally corrupt another person — because the corrupter later stands to be harmed in vengeance by the corrupted person. The matter of moral corruption is important for two reasons: (i) corruption is the accusation that he (Socrates) corrupted the rich, young men of Athens by teaching atheism; (ii) that if he is convicted of corruption, it will be because the playwright Aristophanes already had corrupted the minds of his audience, when they were young, by lampooning Socrates as the "Sophistical philosopher" in "The Clouds", a comic play produced about twenty-four years earlier.