"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."-Robert S. Summers, Journal of Legal Education "Throughout this profound, imaginative and keenly analytical work, [Fuller] demonstrates his continuing concern with the tension in morality and law between the 'is' and the 'ought'. . . . A book of ideas should . . . provoke and contribute new thoughts. This book does both."-Barry R. Mandelbaum, New York Law Forum In this classic work the legal philosopher Lon L. Fuller explores the relationship between law and morality, distinguishing between the morality of duty and the morality of aspiration.

LEGAL POSITIVISM AND NATURAL LAW Three lectures by the Harvard Law School professor examine legal positivism and natural law. In the course of his analysis Fuller discusses Kelsen's theory as a reactionary theory and Hobbes' theory of sovereignty. He defines legal positivism as the viewpoint that draws a distinction "between the law that is and the law that ought to be" and interprets natural law as that which tolerates a combination of the two. He looks at the effects of positivism's continued influence on American legal thinking and concludes that law is necessary in a democracy as a principle of order. LON L. FULLER 1902-1978] was a professor at Harvard Law School and is remembered for his contributions to the law of contracts. His debate with H.L.A. Hart in the 1958 Harvard Law Review (Vol. 71) is noteworthy because it provided the framework for subsequent debates about legal positivism and natural law.

LEGAL POSITIVISM AND NATURAL LAW Three lectures by the Harvard Law School professor examine legal positivism and natural law. In the course of his analysis Fuller discusses Kelsen's theory as a reactionary theory and Hobbes' theory of sovereignty. He defines legal positivism as the viewpoint that draws a distinction "between the law that is and the law that ought to be" and interprets natural law as that which tolerates a combination of the two. He looks at the effects of positivism's continued influence on American legal thinking and concludes that law is necessary in a democracy as a principle of order. LON L. FULLER 1902-1978] was a professor at Harvard Law School and is remembered for his contributions to the law of contracts. His debate with H.L.A. Hart in the 1958 Harvard Law Review (Vol. 71) is noteworthy because it provided the framework for subsequent debates about legal positivism and natural law.

The Tenth Edition continues the approach of earlier editions in emphasizing rich, full-bodied versions of the principal cases, a functionalist approach to the problems of contract law, and analytical notes on such issues as the differences between classical and modern contract law and the role of the limits of cognition in contract law. The new edition includes a great number of new principal cases and case notes, including new materials on consideration, duress, remedies, interpretation, indefiniteness, the statute of frauds, electronic contracting, "browse wrap agreements," and unilateral mistake.

The Concise Edition is a stream-lined version for a four unit course. It omits note materials and cases and a few principal cases. The Tenth Edition continues the approach of earlier editions in emphasizing rich, full-bodied versions of the principal cases, a functionalist approach to the problems of contract law, and analytical notes on such issues as the differences between classical and modern contract law and the role of the limits of cognition in contract law. The new edition includes a great number of new principal cases, including new materials on consideration, duress, remedies, interpretation, indefiniteness, the statute of frauds, electronic contracting, "browse wrap agreements," and unilateral mistake.

The Tenth Edition continues the approach of earlier editions in emphasizing rich, full-bodied versions of the principal cases, a functionalist approach to the problems of contract law, and analytical notes on such issues as the differences between classical and modern contract law and the role of the limits of cognition in contract law. The new edition includes a great number of new principal cases and case notes, including new materials on consideration, duress, remedies, interpretation, indefiniteness, the statute of frauds, electronic contracting, "browse wrap agreements," and unilateral mistake.