Abstract

In Chapter One I present an interpretation of Descartes' theory of distinction. I argue that the best understanding of the notion of separate existence at stake in the real distinction between mind and body is not that each can exist without the other existing, nor that each can exist without a real union with the other, but that each can exist without the attributes of the other. However, the only notion of separate existence which can provide an adequate acccount of all three kinds of distinction--real, modal, and of reason--is that of one thing existing without a real union with another thing. ;In Chapter Two I examine Descartes' claims about the dependence of created substances on God and their independence from other creatures. The pure substances, those which are not composed of parts, can be caused to come into existence and go out of existence only by God, and they can perish only by annihilation. These substances include individual created minds and the extended universe considered as a whole. In contrast, bodies and human beings, which are composed of parts, can be caused to go out of existence by other creatures, and they can perish without being annihilated. Nevertheless, I argue that Descartes thinks bodies and human beings are full-fledged substances. ;In Chapter Three I discuss the union of mind and body. I argue that Descartes thinks the human soul is the only substantial form and that it inheres in the body as form inheres in matter. I defend his account of how two substances can form a unity by comparing it with medieval accounts of the unity of composites. ;Chapter Four examines Descartes' arguments for rejecting substantial forms and the so-called real qualities. I argue that his earliest series of arguments, those from perception and scientific explanation, is the most successful. ;Finally, in Chapter Five, I consider Descartes' positive account of the status of those so-called real qualities which he asserts are merely sensations, for example, color, sound, and heat. I argue that he is best understood as holding that they are modes of both thought and extension which are property ascribed to the composite of mind and body