The Stoics—who inherited so much from the pre-Socratics and from Socrates—wrestled repeated and incessantly (but not fruitlessly) over the issue of free will. If everything had a nature and if everything moral and just came from the right ordering of the universe, one must learn to conform to eternal dictates. Did these dictates harm or encourage our free will? Some Stoics were predestinarians, while others believed in the sovereign individual will choosing to become one with the Natural Law and the Heraclitan Logos. To be sure, all Stoics believed that any violation of the Natural Law was a sin, a violation against creation herself.
The next great moral treatises on free will can be found in Cicero’s On Duties and On the Laws. In the former, Cicero claimed, like Socrates had, that all decisions come down to the individual human person, either abiding by eternal moral laws or rejecting them. Cicero advocated for understanding and acknowledging what was eternally true, especially through manners and decorum. In the latter work, On the Laws, Cicero argued that all things are beholden to eternal truths, but they understand those eternal truths through the exercise of reason, which is the language of man to man, man to god, and god to god. It is, for all intents and purposes, the language of civility and order, that which binds the universe together in justice.
— Read on theimaginativeconservative.org/2020/12/free-will-bradley-birzer.html