Few books have had as great an impact on intellectual history as Kant's The Moral Law. In its short compass one of the greatest minds in the history of philosophy attempts to identify the fundamental principle 'morality' that governs human action. In strikingly fresh, engaging and idiosyncratic prose Kant carries his readers with him as he seeks 'the supreme principle of morality'. Supported by a clear introduction and detailed summary of the argument, this is not only an essential text for students but also the perfect introduction for any reader who wishes to encounter at first hand the mind of one of the finest and most influential thinkers of all time.