Bernard Williams is one of the most influential figures in ethical theory, where he has set a considerable part of the current agenda. In this collection a distinguished international team of philosophers who have been stimulated by Williams's work give responses to it. The topics covered include equality; consistency; comparisons between science and ethics; integrity; moral reasons; the moral system; and moral knowledge. Williams himself provides a substantial reply, which shows both the directions of his own thought and also his present view of earlier work of his which has been extensively discussed for twenty years (such as that on utilitarianism). This volume will be indispensable reading for all those interested in ethical theory.