This volume sets out explicitly and systematically to bring together the two strands of political science– the study of the EU’s international activities, and IR theory – and thus to make a significant original contribution to a developing literature. It provides both a conceptual and empirical argument, the volume provides an innovative perspective on the analysis of the European Union as an international actor, and on the ways in which EU actions are formed and have impact. The volume deals with a number of topical issues in such areas as human rights, global governance and the roles of international organizations. It offers a research agenda based on rigorous development of the framework for role analysis, and demonstrates the ways in which this agenda might be furthered.