It is increasingly acknowledged that animals have an intrinsic moral status, in part due to the influential work of many moral philosophers. However, surprisingly little has been written by philosophers on whether animals are owed social membership and the rights that attach to membership in society. In this paper, I explore why the idea of social membership matters, particularly in relation to domesticated animals, and how it can guide legal and political reforms. Focusing on social membership identifies neglected avenues for (...) transformative change, and offers new ways of challenging the deeply-embedded ‘human use typologies' that currently govern our relations to domesticated animals. It also raises fascinating philosophical questions about the definition of ‘society' and the role of an ethics of membership. Ultimately, we will need to develop a new philosophy of interspecies society. (shrink)