The three main theories used in international political economy are constructivism, realism and liberalism. Scholars commonly use theories to explain economic events in international political economy. Liberalists are concerned with individual interest, while constructivists are very concerned with how international relations are constructed by the ideas of the system. This article uses realism theory to explain the relationships between state and non-state actors in the international system. Realism is based on the idea that the international system exists according to the Hobbestian state of nature, which is anarchic and brutal. There is no authority over the states in the system (Marten 9/12/2011). Influential states have powers that they use to subjugate the poor and powerless in the system. To understand the theory in detail, the contribution evaluates three supranational regimes and their function in the international system. States agree to form governments that control internal affairs. It is no surprise that any sovereign state has the power to enforce and prescribe laws. These powers are limited in the international system because there is no Leviathan to control the activities of all members. The first argument is that the United States and other major powers use supranational organizations to advance their interests (Wolf 87). The WTO is a global body charged with overseeing how countries conduct trade globally. Liberalists argue that the body is beneficial to all states that sign up to it because they benefit from free markets and trade opportunities. According to the liberals' point of view, the world organization responsible for trade should arbitrate conflicts arising from trade and commerce. N... half the paper... is in danger. Tourists have been kidnapped more than once, which has had serious repercussions on the tourism industry. It should not be forgotten that Kenya generates over 20% of its total revenue from tourism. Al Shabaab militiamen therefore represent a threat to Kenya's interests. Works Cited Gholz, Eugene and Daryl, Press. “Protecting the 'Prize': Oil and the U.S. National Interest.” Security Studies, 19.3, 2010, 453-485. Milner, Helen. “Globalization, Development, and International Institutions: Normative and Positive Perspectives.” Review Essay, 3.4 , 2005, 833-854.Rosato, Sebastian. "The Problems of Europe: Power Politics and the State of the European Project." international, 35.4, 2011, 45-86.Stone, Randall. “How to reform the IMF”. Current History, 109.730, 2010, 342-348.Wolf, Martin. Why globalization works. 1st ed. Sydney: Yale University Press, 2004.6