There are a plethora of ways of answering this question and the purpose of a university-level essay is to demonstrate your understanding of this. This shows how you can simultaneously think critically and laterally. For example; The "politics" of geopolitics is all about how different countries around the world interact with each other. At this level, the "politics" of geopolitics is very similar to international relations. On another level- the very "doing" of this "politics" also has a politics. Certain countries follow years old philosophies which alter their levels of entitlement in the international sphere. The most obvious example of this would be the Truman Doctrine which encourages the United States to intervene in foreign affairs. Finally, there is a postcolonial politics to Geopolitics, in that the very notion of a global politics is based on Western conceptions as to what a "global" sphere should look like in the first place.