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.
Free will in antiquity
It was the Stoic school of philosophy that solidified the idea of natural laws controlling all things, including the mind. Zeno of Citium, the original founder of Stoicism, had a simple but powerful idea of the causal chain compared to Aristotle. Zeno said that every event has a cause, and that cause necessitates the event. Given exactly the same circumstances, exactly the same result will occur.