Introduction It is important for individuals to think theoretically in order to understand the factors that lead to the occurrence of events and their outcomes (Nosotro 4). It is also important for people to be aware of the current affairs of the world and the impacts they have on their lives, their societies, their states and the world at large. At the present moment, the world is facing a number of issues. For instance, the United States of America is pulling out its troops from Iraq, the European Union is meeting to come up with a strategy that will solve the economic crisis in its member states, presidential candidates are trying to win the support of the US citizens, Palestine war prisoners were released by the Israeli government to save one Israeli soldier and Libya is trying to recover from a change in regime. These are just but a few of the current issues that the globe is facing. All these issues are as a result of politics. It is politics that drives the manner in which a nation is run and the relationship that it will have with its citizens, neighbours and other states of the world. However, different individuals have different political ideologies. Thus different nations of the world are run by leaders who have different missions and visions and definitely, they have different methods of achieving these goals and objectives (Hoffman 31). In addition, the larger majority of the community also have different political ideologies. It is due to this fact that scholars have developed various theories that explain these ideologies and the impacts they have on world politics. This essay shall therefore focus on the theories of realist, liberals and feminists. Through critical analysis, it shall expound on their differences and the impacts they have on world politics and international relations. Realism Realism is a political theory that bases its arguments on the notion that world politics is based on the self-interests of nations (Adler 19). Due to this fact, nations try to gain superiority or dominance over other states. Realists therefore believe that nations are in a race of proving which one amongst them all is more powerful over the others. To achieve this, nations need to have a strong military to protect its boundaries and interests, a strong economy and a society that is loyal to the state (Burchill 41). According to Burchill (2000), in the process of struggling for power, the success of a nation will definitely result to failure of another. This is referred to as the Zero Sum-Game. The elements of realism with regards to international relations can be traced back into ancient history. Sun Tzu (544-496 B.C), the Chinese General and the author of The Art of War and Thucydides (460-399 B.C), the great Greek Historians are believed to be the earliest realist in history (Cohen 412). Through their words and actions, they managed to impart this ideology into the minds of masses. However, in modern times, realism was exhibited through the words and actions of strong political figures. Otto von Bismarck (1815-1898) is among the earliest rulers to apply the concept of realism in his regime. Through his realist beliefs and actions, he managed to un