According to a prominent view in contemporary philosophical discussions of animal ethics—a view the author calls unitarianism—animals have the same moral status as people do, so that otherwise similar interests of animals and people should be given the very same consideration in moral deliberation. In contrast, this book lays out and defends a hierarchical approach, according to which people count more than animals do, and some animals count more than others. Surprisingly, although this idea is close to being commonsense, for the most part moral theories have not been developed in such a way as to take account of these crucial differences in status. Accordingly, the author both argues for a hierarchical account of morality and explores what suitably status sensitive moral principles might look like. Particular topics examined include the modification of distributive principles to take account of status, whether animals should be given deontological standing, and the moral complications that arise in cases that either involve defending animals or defending people from animals. The book also considers what the basis of moral status might be, and it responds to some of the potentially troubling implications of adopting a hierarchical approach to morality.