Henry Sedgewick's The Methods of Ethics challenges comparison, as no other work in moral philosophy, with Aristotle's Ethics in the depth of its understanding of practical rationality, and in its architectural coherence it rivals the work of Kant. In this historical, rather than critical study, Professor Schneewind shows how Sidgewick's arguments and conclusions represent rational developments of the work of Sidgewick's predecessors, and brings out the nature and structure of the reasoning underlying his position.