The concept of Europe has always been most concise where it was not defined in contrast to something else. After the end of the Cold War the clear-cut antagonism of East (evil) and West (good) has outlived its usefulness and has been replaced by a number of diffuse threats, all of which target the micro-security of individual citizens, and a diffuse and ubiquitous insecurity that encompasses every part of social life. Immigration, organized crime, and imported terrorism as well as social, ecological and economic threats in this sense are external phenomena, and their intrusion into the community has to be prevented. The EU enlargement process and its aftermath have made the matter even more challenging. But who defines what Europe is and what it is not? How is this categorisation produced, reproduced and institutionalised? And how do the "excluded" react towards, handle and maybe even subvert this categorisation?