Contents: Separability, Sources and Rules: Authority, law and morality, Joseph Raz; Rules and social facts, Jules Coleman; Wilfrid Waluchow and the argument from authority, Tim Dare; Rules and the rule of law, Frederick Schauer. Rules and Authority: Second-order reasons, uncertainty and legal theory, Stephen R. Perry; Law and exclusionary reasons, Larry Alexander; Positivism and the foundations of legal authority, Rolf Sartorius; Positivism through thick and thin, Frederick Schauer. Prescriptive Positivism: A moralistic case for a-moralistic law, D. Neil McCormick; Constitutional positivism, Frederick Schauer; Natural law ambiguities, Robin West; Legislation, authority and voting, Jeremy Waldron; The point of legal positivism, Tom D. Campbell. Revisiting the Classical Positivists: Was Hobbes a legal positivist?, Mark C. Murphy; Kant's legal positivism, Jeremy Waldron, The expositor, the censor and the common law, Gerald J.

Postema; The neo-Kantian dimensions of Kelsen's pure theory of law, Stanley L. Paulson; Misunderstanding positivism, Anthony J. Sebok; Name index.