Natural law is a perennial though poorly represented and understood issue in political philosophy and the philosophy of law. Mark C. Murphy argues that the central thesis of natural law jurisprudence--that law is backed by decisive reasons for compliance--sets the agenda for natural law political philosophy, which demonstrates how law gains its binding force by way of the common good of the political community. Murphy's work ranges over the central questions of natural law jurisprudence and political philosophy, including the formulation and defense of the natural law jurisprudential thesis, the nature of the common good, the connection between the promotion of the common good and requirement of obedience to law, and the justification of punishment.