Is there sound logic and argument for cooperation in the international system? How do you see cooperation in International Relations (IR) applied? Is cooperation a valid from of analysis in IR? These questions set up a debate that forms the foundation upon which IR operates. To make an argument for cooperation you have to put together the game board IR pieces move around. This can be done by understanding the basic premise between Realism and Liberalism. Only then are you able to look at the ideas within Regime Theory and Complex Interdependence and see how they look when analyzed and applied to the international system. Now the arguments for cooperation are more present and clear. Regimes are supported in both Neorealism and Neoliberalism. As well, regimes and international organizations act as intermediaries between actors by creating conduits for connection. Looking at the European Union (EU) as if it were a case study, we can use it to further bolster the argument for cooperation as a form of analysis and as a useable tool.