Global politics in the post-World War II era was dominated by the existence of an arms race between the U.S. and the U.S.S.R. Recent documents and revision of our understanding of this period leads to a re-analysis of its importance. As a security dilemma, are arms races a thing of the past? Or of continued importance in understanding the daunting choices faced by policy makers?
There is a great page on the wide ranging arena in which The Prisoner's Dilemma has been applied. Much on this page is unrelated to world politics, as far as I can tell. But it does provide an ethical slant to the basic collective choice problems.
If you want to Solve Zero Sum games, you can do this thanks to David Levine at UCLA. His home page is also cool.