Book excerpt: As the European Union faces the ongoing challenges of legitimacy, identity, and social cohesion, an understanding of the social purpose and direction of EU citizenship becomes increasingly vital. This book is the first of its kind to map the development of EU citizenship and its relation to various localities of EU governance. From a critical political economy perspective, the authors argue for an integrated analysis of EU citizenship, one that considers the interrelated processes of migration, economic transformation, and social change and the challenges they present.