One of the important premises of realism (particularly neo-realism) is the anarchical structure of the international system. There is no central authority to govern the relations among states. In such an international environment, naturally providing security becomes the main concern of states. States have to deal with their own security problem that is called as the rule of “self help”. Since all states behave the same way, no state can attain utmost security; rather feed the insecurity for all states that is called as the security dilemma