Descartes ve Leibniz'de muhtemellik

It's by freedom that the man is or can become a responsible person. But if the physical world is causally determined, how can there be a free will? If the laws of nature are necessary, so, the man, in principle, can not avoid from them. So, we must examine the modalities of the laws of nature since the contradiction between necessity and freedom calls the notions of possibility and contingency. In this context, this work focuses on the relation between the specific modality of contingent propositions and the temporality of contingent facts; the question of the compatibility between freedom and divine predetermination, and the justification of the existence of evil in the world in the philosophical systems of Descartes and Leibniz.