This article is a defense of Michael Ruse's sociobiological account of the origins and nature of morality. In the piece, the author provides a summary explanation of Ruse's views and arguments. Then he goes on to explain and critically discuss a variety of objections that have been made against sociobiological accounts of morality. He argues that the criticisms that have been made often work against less sophisticated sociobiological theories but that Ruse's theory is immune to the criticisms. The author responds (...) to the arguments of the following critics of sociobiology: Kitcher, Flew, Flanagan, Nagel, Miles, Singer, and Jacquette. Key Words: Michael Ruse • E. O. Wilson • sociobiology • altruism • ethical naturalism. (shrink)