Medieval Political Philosophy: A Sourcebook, edited by Ralph Lerner and Muhsin Mahdi, has been a classroom favorite since its publication in 1963. When it first appeared, it was the only anthology of medieval political philosophy to contain major texts from all three Western monotheistic traditions-Christianity, Judaism, and Islam-and that claim remains true today. This new edition of this classic text of political philosophy-revised and enlarged by Joshua Parens and Joseph C. Macfarland-will make accessible to today's students the insights of these profound medieval thinkers. Prior to the modern separation of religion from politics, these medieval thinkers explored a variety of approaches to the relation between religion and politics-approaches that prompted renewed interest in a world divided over how best to relate the two. For the authors gathered in this volume-including Alfarabi, Alghazali, Averroes, Maimonides, Judah Halevi, Thomas Aquinas, Boethius of Dacia, and Dante Alighieri among many others-there was a greater uniformity of general intention than at any other period. All of these authors studied the works of classical political philosophy and considered in a variety of ways the implications of this political thought for their contemporary situation in a monotheistic religious community.