  It is often assumed that cosmopolitanism must necessarily be in tension with more local attachments to friends, family or compatriots. Some cosmopolitans believe such conflict is inevitable and a necessary part of understanding what cosmopolitanism entails but that this implication is unproblematic (Ypi 2013).  Others argue for different ways in which the apparent tensions could be resolved (Pogge 2013, Tan 2004). As we see above, Pogge emphasizes the clear separation of spheres in which equal consideration of people’s interests applies. Kok-Chor Tan also offers a similar argument. His strategy is to show that cosmopolitan principles should govern global institutional structures that ensure people are treated as equals in their entitlements (Tan 2004). When this is the case there can be a legitimate role for patriotism that operates within such constraints. Partiality to co-nationals need not conflict with cosmopolitan obligations. Another notable strategy is to argue that we cannot achieve justice at a national level unless we attend to justice at a global level. On this view, we have at least instrumental reasons to care about global justice, even if we care deeply about social justice in our nation (Banai, Ronzoni and Schemmel 2011, Ronzoni 2013).