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). Ye