This book aims to discover the limits of European integration. To accomplish this the study uses grounded theory methodology to deal with some of the problems with European integration theories and international relations. Furthermore the idea of European Union (EU) is investigated in relation to Kantian and Hegelain thought which again allows a re-assessment of European integration and its limitations. The rationale for the study was provided by the rapidity of change that has taken place over the last fifteen years. As European integration intensified the theories that informed and explained the process became questionable. Theories previously discarded especially neo-functionalism, needed revisitation and re-assessment. This ground-breaking study provides such a re-assessment and through an empirical study reaches conclusions and makes generalisations regarding the process and limitations of European integration.