To appreciate fully the ethical dimensions inherent in the literature of the eighteenth century it is necessary to understand the moral bias of an author, a bias often best ascertained by a study of the treatment he accords good nature and prudence. Although several scholarly articles and portions of longer studies recognize the importance of these virtues for individual writers, no single work has appeared which traces fully the history of the idea of good nature and prudence as complementary virtues in the eighteenth century. The present study provides a systematic analysis of these virtues as treated in theology, ethical philosophy, and fiction from the later seventeenth century to about 1800.