Lewis is known as an epistemologist and logician but not as a value theorist. This chapter argues that Lewis's contributions to metaethics have been unjustly overlooked. The recovery of Lewis's metaethics requires situating Lewis as a pragmatist value theorist, and developing four key planks of his value theory. The chapter concludes with explication of why Lewis's value theory has been forgotten and how it can be used to resolve a debate between cognitivists and emotivists in contemporary metaethics.