Most people agree that animals count morally, but how exactly should we take animals into account? A prominent stance in contemporary ethical discussions is that animals have the same moral status that people do, and so in moral deliberation the similar interests of animals and people should be given the very same consideration. In How to Count Animals, more or less, Shelly Kagan sets out and defends a hierarchical approach in which people count more than animals do and some animals count more than others. For the most part, moral theories have not been developed in such a way as to take...