The morality of law book description in a lengthy new concluding chapter labeled a reply to critics lon l fuller extends and clarifies his definition of the relation between law and morality put forward in the first 1964 edition of the morality of law his original argument distinguishes between the morality of duty and the morality of . Morality of law and the internal morality of law the internal morality of law is essentially concerned with the procedure of making law it is the technique used by the lawmaker in deciding which rule of 3 this breakdown is similar to the approach of henri bergson bergson wrote that morality may result from pressure or aspiration and he described what he called the. The morality of law the morality of law is the product of the welcome spur of an invitation to fuller to deliver a series of four lectures at yale law school in april 1963 1 the chapters of the book each having its own fairly distinct sphere of concern stand as a record of those lectures with apparently few changes. The morality of law will find a place among the important books in the history of american legal philosophy it includes insights into the relations between morality and law and advances a theory of law of great practical relevance this is the best discussion of the demands of the rule of law in existing literature filled