The word ‘cosmopolitan’, which derives from the Greek word kosmopolitês (‘citizen of the world’), has been used to describe a wide variety of important views in moral and socio political philosophy. The nebulous core shared by all cosmopolitan views is the idea that all human beings, regardless of their political affiliation, do (or at least can) belong to a single community, and that this community should be cultivated. Different versions of cosmopolitanism envision this community in different ways, some focusing on (...) political institutions, others on moral norms or relationships, and still others focusing on shared markets or forms of cultural expression. The philosophical interest in cosmopolitanism lies in its challenge to commonly recognized attachments to fellow citizens, the local state, parochially shared cultures, and the like. (shrink)