C.S. Lewis, who was one of the most popular and widely read Christian writers of the twentieth century, here argues that ethics requires religion. He argues that there is an objective Moral Law, that this Moral Law must have a source, and that this source could only be God.This exercise deals with a reading from Lewis in our anthology (pages 241-6 of Philosophy of Religion: Selected Readings (second edition), edited by Peterson, Hasker, Reichenbach, and Basinger). These computerized exercise materials are copyrighted (c) 2002 by Harry J. Gensler; but they may be distributed freely.