Reconsider the influence of H. L. A. Hart’s The Concept of Law (1961) in its fiftieth anniversary, in particular, and thelegacy of his work, in general, is an idea that first came tomind in informal discussions between Tom Campbell, ImerB. Flores, and Wilfrid J. Waluchow during the ConferenceThe Legacy of H. L. A. Hart: Legal, Political, and Moral Philosophy,organized by the Cambridge Forum for Legal and PoliticalPhilosophy, in Cambridge University, Cambridge(United Kingdom), July 27-28, 2007.