Abstract
This chapter examines the debates concerning the theory of ideas in Great Britain during the seventeenth century, focusing on the concept, origin, and types of ideas. It explains that the so-called way of ideas that are primarily associated with Rene Descartes and John Locke represent attempts to replace scholastic Aristotelian theories of the nature of the mind and its relation to the world. The chapter also discusses the relevant works of Thomas Hobbes and the Cambridge Platonists, and considers the relevance of skepticism and idealism to the notion of ideas.