The concept of security has traditionally referred to the status of sovereign states in a closed international system. In this system the state is assumed to be both the object of security and the primary provider of security. Threats to the state's security are understood as threats to its political autonomy in the system. The major international institutions that emerged after the Second World War were built around this idea. When the founders of the United Nations spoke of collective security, they were referring primarily to state security and to the coordinated system that would be necessary in order to avoid the 'scourge of war'. But today, a wide range of security threats, both new and traditional, confront Europe, or at least as some would say.