On the History of the Idea of Law is the first book ever to trace the development of the philosophical theory of law from its first appearance in Plato's writings to today. Professor Letwin finds important and positive insights and tensions in the theories of Plato, Aristotle, Augustine, and Hobbes. She finds confusions and serious errors introduced by Cicero, Aquinas, Bentham, and Marx. She harnesses the insights of H. L. A. Hart and especially Michael...