This new edition of a reader on European integration makes conveniently available to students the key texts of politicians and scholars. The first section presents the visions of the primary shapers of the Union, now including the reflections of current European leaders on a constitution for Europe. The second section brings together the classics of EU studies as scholars struggled to apply the contending approaches of federalism, functionalism, neofunctionalism and inter-governmentalism to understand postwar European integration. The third comprehensively revised and updated section explores theoretical developments in scholarship.