What could be the legitimation basis of the European Union (EU)? This article questions the idea of two constitution-making subjects in the EU and claim there is and can only be one constituting subject even in a multilevel configuration like the EU. The EU can thus not be seen as a federation of nation states. Rather it must be seen as a quasi-federation of states and citizens united under a common legal framework with a universalistic underpinning. The EU’s commitment to basic human principles means that it has a communal vocation that is broader and more universal than that of a multinational federation.
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