The purpose of this chapter is to discuss the relationship between globalisation and societal insecurity, and to relate this to the events of 11 September 2001. The main perspective is that globalisation increases the importance of societal insecurity, and that the events of 11 September marked an important step in the globalisation of a specific form of societal insecurity: terrorism. Further, these events and the reactions in their aftermath created a new, ‘formative’ situation in global politics in which the threat from terrorism was ‘securitised’ and attempts are made to legitimise new security policies and strategies. The result is that we experience a new competition between different strategies not only for security, but also for governance in the global system.