When I first began teaching an Introduction to International Relations course, I quickly saw that my students needed something more than just reading about and listening to lectures on the clashes of perception which are at the heart of international politics. How better to do this than to have them participate in a simulation in which those clashes of perception would surface. Although one could choose one of any number of international organizations to simulate, the U.N. Security Council is probably the best due to its size and geographic balance. Having decided to use a simulation, I was immediately faced with crucial decisions as to how the simulation would be run especially in terms of the complexity of the rules used and the choice of nations to be represented.