 Political nationalism has had much influence on debates on global justice. Some have argued that because moral cosmopolitan commitments trump commitments to (national) legitimacy, a conception of global justice can be detached from concerns with legitimacy (Beitz 1979a,b, 1998; Pogge 2008). Others have argued—again assuming political nationalism—that legitimate authority at the level of the nation state is necessary to pursue moral cosmopolitan goals (Ypi 2008 provides an empirical argument). Yet others have argued against the idea of global justice altogether, on the grounds that political legitimacy ties obligations of justice to nation states (Blake 2001; Nagel 2005). What these approaches to global justice have failed to address is the possibility of sound political cosmopolitan conceptions of political legitimacy. Hassoun (2012) takes this issue as her starting-point. She argues that the coercive power of global governance institutions raises a legitimacy problem of its own and, turning the arguments of Blake (2001) and Nagel (2005) on their heads, that securing the legitimacy of those institutions entails obligations of global justice.