This book investigates the birth of the European individual as a juridical problem. Inspired by Foucault's story of the modern subject, this book considers the encounter between legal and other practices within a more general field of juridical power: a network of active relations, between different social spheres. Through the examination of six legal case dossiers from the European Court of Justice, the European individual, it is argued, emerged out of this field - and its practices of knowledge-power - at the intersection of regimes of law, economy and security.