Moreover, the structure changes of the international system also affecting the states behave. The structure of the international system explains in large part how the state behaves. The structure causes state to behave aggressively and it will lead to engage security competition; it is the fact that no higher authority above state. Because of that the state will extend, domain or balance on power with other state. According to the structural realism it is the structure or architecture of the international system that forces states to pursue power. In a system where there is no higher authority that sits above the great powers, and where there is no guarantee that one will not attack another (Mearsheimer, 2006). The parts of international political …show more content…
The United States used military means in one way or another to intervene in the affairs of other countries about twice as often as did the Soviet Union. The Soviet Union's aim was to export its ideology by planting and fostering Communist governments in more and more countries, and America's was to plant and foster democratic ones (Waltz, 1993: 48). Waltz explained from the structural theory that states strive to maintain their positions in the system and bipolar is the less war prone than multipolar. In the bipolar system, the power had balanced between the United State and Soviet Union. During the Cold War period the Soviet Union balanced the power of the United States, whereas the United States balanced the power of the Soviet Union. However, the end of Cold War and the disintegration of Soviet Union led to unipolar system, United State became powerful state in International system. Moreover, United State behaves like hegemon in international relations because of no countervailing power in world. Many Neorealist like Kenneth Waltz argued that the United States have gone a bit too far; facing no serious countervailing force, it has set out to expand its influence around the globe with the years 2001–2009 under George W.