Gunther's book demonstrates that most objections to moral and legal principles are directed not against the validity of principles but against the manner of their application. If one distinguishes between the justification of a principle and its appropriate application, then the claim that the application of the principle in each individual case follows automatically from its universal justification proves to be a misunderstanding. Gunther develops this distinction with the help of Habermas's discourse theory of morality. He then employs it to extend Kohlberg's theory of moral development and...