The First World War, like the Second, was to have a profound impact upon the development of European integration. However, the First World War also ushered in a period of violent instability which dramatically shaped the form of integration in Europe. It is the central contention of this book that the integration process can only be understood and assessed in the light of this instability. In this broad-ranging, chronological study, the author charts the development of European integration since 1914, from Pan-Europa to the relative uncertainty of the post-Cold War period. The volume will be of interest to students, academics and researchers.