Originally published in 1986, this book explores the animating qualities of human character and moral thought and discusses how they place constraints on the adequacy of moral theories. It evaluates some of the major theories in the history of ethics, notably the moral thoughts of Sidgwick, Kant, Aristotle and Hume. The book examines questions of fundamental importance to all of us and broadens the scope and wisdom of analytical philosophy by conveying the excitement of original philosophical research.