Abstract
After drawing a distinction between a cosmopolitan attitude and institutional cosmopolitanism, this paper reconstructs Habermas’s account of the relationship between morality and law in order to argue that this account can be the basis of a cosmopolitan attitude which, although insufficient, on its own, to ground cosmopolitan institutions, can, nonetheless, motivate interest in institutional cosmopolitanism. The paper then examines Habermas’s proposal for institutionalizing a system of cosmopolitan governance. It distinguishes and explores the reach and limitations of three arguments in favor of institutional cosmopolitanism not always adequately differentiated in Habermas’s work: (a) an argument from the weakness of the nation state, (b) an argument from the democratic deficit of nationalism, and (c) an argument from the state’s incapacity to guarantee human rights.