Part 1 Aims of the study. Part 2 The classical background and the revival of naturalism. Part 3 Hutcheson: Hutcheson's theory of virtue; moral sense, approval and moral judgement; the inadequacy of reason as the sole source of moral approval. Part 4 Hume: Hume's general theory of virtue, moral sense and moral judgement; the natural and artificial virtues; moral perception, moral fact and reason; reason alone connot distinguish virtue from vice. Part 5 Smith: Smith's progress on Hutcheson and Hume; propriety; merit; duty; the virtues; moral approval and reason. Part 6 Beyond Hume and Smith: fairness; rights; obligation; virtue and moral virtue. Part 7 Moral Knowledge.