Theories of religious pluralism have been present within the philosophy of religion since the 1700s, when G.W.F. Hegel and F.D.E. Schleiermacher established the modern discipline on the understanding that the philosophical study of religion embraced all religions. Religious pluralism came to prominence within the philosophy of religion in the 1980s, with the work of the British philosopher John Hick (1922–2012) being seminal. During the 1990s, philosophical work on religious pluralism and related topics was dominated by the discussion between Hick, his supporters, and his critics. Hick’s theory of religious pluralism is still the most comprehensive and widely discussed in Anglo-American philosophy of religion. In his development of the theory, Hick engaged with, and was often influential upon, work in other areas of philosophy, especially metaphysics, epistemology, and the philosophy of language. This intersection of philosophical concerns continues to make the investigation of religious pluralism a focal point within the philosophy of religion. This article provides an overview of these developments, along with annotated references to key research works.