This chapter deals with recent theoretical work on the European Union. Three broad analytical pathways are discussed: comparative political science; a revitalized international relations (IR); and ‘critical theories’. This chapter discusses in turn the contribution to EU studies of comparative political science in general and new institutionalist political science, and in particular the emergence of social constructivist approaches to the EU, IR’s contribution to the theorization of EU external action, together with approaches from the subfield of international political economy (IPE), and a variety of critical theoretical readings of the EU. The chapter also explores how IR theories might be brought back into EU studies. The purpose of the chapter is to show how the EU still raises significant questions about the nature of authority, statehood, and the organization of the international system. These questions are doubly significant in the present period of crisis, where the issue of ‘disintegration’ comes to the fore.
