[Review Essay: Russ Shafer-Landau, Moral Realism: A Defence (Oxford: Clarendon Press, 2003), x + 322 pp.] In 1903 G.E. Moore celebrated a robust nonnaturalistic form of moral realism with the publication of his Principia Ethica. Subsequent years have witnessed the development and refinement of a number of views motivated at least in part by a deep resistance to the metaphysical and epistemological commitments of nonnaturalism. Over time, Moore's view arguably has become the position of last resort for philosophers working in metaethics.
