The book argues that: nationalism is persistent, not merely because of its specific ideological appeal, but because it expresses some of the major conflicts in modernity; nationalism reflects and reinforces four key trends in western social development: state formation, democratization, capitalism and the rationalization of culture; the forms of nationalism can be organized into a comprehensive typology which is outlined in the course of this study; post-nationalism and cosmopolitanism are significant innovations in the debate about nation-states and nationalism; and that the new radical nationalisms have become powerful new movements in the global age.