Since the Origin of Species was first published, Darwinism has been attacked for undermining traditional morality. In particular, because it emphasizes the kinship between humans and other animals, Darwinism seems incompatible with the traditional idea of human dignity - that human life has a special value, while other animals may be sacrificed for any purpose that humans choose. This book argues that Darwinism does undermine the traditional idea of human dignity; however, this is not a reason for rejecting Darwin's outlook. Instead, it is a reason for rejecting human dignity and replacing it with a better moral view, a more enlightened ethic regarding both the value of human life and our treatment of nonhuman animals. This important book, presenting Darwin's scientific and non-scientific views as one united theory, will stimulate all those interested in evolution, morality, religion, and animal rights to re-examine their views.