Abstract

This chapter explores several episodes in the eighteenth-century discussion of the metaphysics of mind. It begins with Locke’s suggestion that it would not be impossible for God to “superadd” the power of thought to matter. It then describes the debate about Locke’s suggestion between Samuel Clarke and Anthony Collins, and considers Hume’s discussion of the immateriality of the soul in relation to that debate. Next it presents Berkeley’s philosophy of immaterialism as a way of protecting the mental from reduction to the physical. Then it gives an account of the materialist arguments of Hartley and Priestley, and concludes with a summary of Reid’s criticisms of those arguments.