This remarkable book is the most comprehensive study ever written of the history of moral philosophy in the seventeenth and eighteenth centuries. Its aim is to set Kant's still influential ethics in its historical context by showing in detail what the central questions in moral philosophy were for him and how he arrived at his own distinctive ethical views. The book is organised into four main sections, each exploring moral philosophy by discussing the work of many influential philosophers of the seventeenth and eighteenth centuries. In an epilogue the author discusses Kant's view of his own historicity, and of the aims of moral philosophy. In its range, in its analyses of many philosophers not discussed elsewhere, and in revealing the subtle interweaving of religious and political thought with moral philosophy, this is an unprecedented account of the evolution of Kant's ethics.