In recent years postnational theory has become a primary tool for the analysis of European integration. Though interpretations of the concept vary, there is a wide consensus about postnationalism as a way to forge a European identity beyond a particular national history. In line with the German historical context in which this key concept was formulated in the first place, postnationalism is considered to be an adaptation of Kantian cosmopolitanism to the conditions of the modern world. This collection of essays is the first to systematically and comparatively explore the links between postnationalism and cosmopolitanism within the context of the New Europe.