This collection of influential essays illustrates the range, depth, and importance of moral realism, the fundamental issues it raises, and the problems it faces. Geoffrey Sayre-McCord has chosen accessible, rigorous, and thought-provoking papers, all of which are rich enough to encourage and reward several readings and careful study. In addition, the volume strikes a balance between wide-ranging papers that advance a barrage of arguments, and more focused papers that develop a few arguments in great detail. What emerges is a comprehensive overview of the moral realism debate that exhibits the scope, as well as the intricacies, of the arguments marshaled on all sides. It will be welcomed by scholars and students of philosophy, the social sciences, and political science. CONTRIBUTORS: A. J. Ayer, Simon Blackburn, Richard Boyd, Gilbert Harman, Jonathan Lear,' J. L. Mackie, John McDowell, Mark Platts, Geoffrey Sayre-McCord, Nicholas Sturgeon, David Wiggins, Bernard Williams.