Abstract
I distinguish between freedom of action, which is incompatible with determinism, and freedom of the will, which is not, following the Spanish scholastic Molina who defined freedom of the will as the power of affirming a proposition as well as of denying it. Reviewing the arguments for and against man's having this power I argue myself that man's capacity of acting for the sake of liberty shows that we must attribute freedom of the will to man, that it does not imply indeterminism, is compatible with the laws of physics but not with determinism