In his book On Foundationalism, Tom Rockmore reviewed the efforts to develop a cogent form of foundational realism and concluded that the doctrine is no longer viable and should be abandoned. In On Constructivist Epistemology, Rockmore expounds upon the idea of constructivism as introduced at the end of On Foundationalism. On Constructivist Epistemology belongs to an ongoing effort to call attention to the resources of a modern epistemological approach, which is focused in Kant and which is followed up virtually throughout the later debate. Rockmore traces the idea of constructivism and then proposes the outlines of an original constructivist approach to knowledge, building on the work of such thinkers as Hobbes, Vico, and Kant