What do you mean by game theory of international relations?

Game theory can be used to explain the behavior of states in the international system, especially under realist philosophies. By assuming that all actors in the system are rational and that the system is anarchic, game theory can be used to model a scenario and to determine the most probable outcome One common application of game theory to IR, for example, is the application of the prisoner's dilemma problem to model the behavior of two states acting in their own self intrests.