Mark C. Murphy received his Ph.D. in 1993 from the University of Notre Dame. After spending the first two years of his career at the University of Hawaii, he came to Georgetown, where he is now Professor of Philosophy.

His research interests include moral, political, and legal philosophy and the history of early modern philosophy. His research focuses on natural law theory both in its historical manifestations and as a live option for jurisprudence and the theory of practical reasoning. He is the author of Natural Law and Practical Rationality (Cambridge, 2001), An Essay on Divine Authority (Cornell, 2002), Natural Law in Jurisprudence and Politics (Cambridge, 2006), and Philosophy of Law (Blackwell, 2006), and is editor of Alasdair MacIntyre (Cambridge, 2003). He has also written a number of papers on Hobbes’s moral, political, and legal theory, among which are “Was Hobbes a Legal Positivist?” (Ethics, 1995), “Deviant Uses of ‘Obligation’ in Hobbes’ Leviathan” (History of Philosophy Quarterly, 1994), “Hobbes on the Evil of Death” (Archiv fur Geschichte der Philosophie, 2000), and “Desire and Ethics in Hobbes’s Leviathan: A Response to Professor Deigh” (Journal of the History of Philosophy, 2000).