Abstract

The central focus of my dissertation is the study of the naturality in Leibniz's philosophy. Leibniz makes a number of statements concerning natural predication, including: the soul is naturally immortal; personal identity naturally presupposes the identity of the soul; reflective apperception cannot naturally deceive; matter cannot naturally think or act at a distance. These claims are not only central to Leibniz's philosophy of mind, but to his system as a whole; moreover, some of them constitute the basis of his criticism of Locke in the New Essays. Nevertheless, these claims have never received the attention they deserve, nor have they been studied as a whole. ;In the course of my thesis, I argue that Leibniz's statements concerning naturality are best understood as involving a type of necessity which is weaker than logical, or metaphysical, necessity. I develop the position that a subject S is naturally P if and only if: It is logically or metaphysically possible for S not to be P , and It is logically or metaphysically impossible for S to be not-P except through miraculous divine intervention. Simply put, I argue that these two conditions follow from Leibniz's views on inherence in combination with the logical version of the Principle of Sufficient Reason, which he thinks entails that every event has a cause. ;The thesis is divided into two main parts. The first studies the general concepts, such as inherence and contingent predication, which are necessary to understand the notion of natural necessity and to show that it plays a legitimate role in Leibniz's system. The second part examines in detail some particular cases of natural necessity, such as the natural veridicality of reflection and the natural immortality of the soul, as well as the natural inability of matter to think