In International Relations debates’ we often deal with ‘security’, in both realist and idealist approaches. From Hobbes politics has been concerned about security issues of states and other organizations. Yet, little effort has been made to clarify theoretically what ‘security’ means, and only recent contributions have moved in such direction. Theories of IR have always been polarised between two core concepts: power and peace. These concepts developed mainly during Cold War and have provided narrow views of international affairs, while an approach based on security could deal better with global complexities.