 Given the long-standing view that non-humans are mere things, there are still many who reject the arguments presented here for the moral considerability of non-humans and the significance of their interests. Nonetheless, most now realize that the task of arguing that humans have a unique and exclusive moral status is rather difficult. Yet even amongst those who do view animals as within the sphere of moral concern, there is disagreement about the nature and usefulness of the arguments presented on behalf of the moral status of animals.