the structure of unipolar international system and its impact on foreign policy; the case of the united states

there have been many debates and discussions about the shape of new international system and its structure in post cold war era by the scholars and writers of international relations discipline. notwithstanding, this question continually being asked that, what kind of structure is being shaped in post cold war era and how does it impact in foreign policy behaviors of political unites in particular, the super power. it seems that, it would be possible to use kenneth waltz‘s theory of international politics to determine the structure of international system as unipolar and then, to explain the behavior of the major power. at the end, the out coming model will apply to the role of the united state in the post cold war era and compare the behaviors of this super power in two different eras of international system.