This book offers an innovative theoretical and empirical analysis of integration in EU foreign and interior policies across the three pillars, from the Maastricht Treaty to the Treaty of Nice.

The establishment of the three pillar structure with the Maastricht Treaty has been one of the key transformations of European governance. This divided EU policies into three main areas: European Community, Common Foreign and Security Policy (CFSP) and Justice and Home Affairs (JHA) and for the first time the two sovereignty related areas of foreign and interior policies became part of the...