Introduction: Game Theory and Peace -- Strategic Decisions: Game and Strategy: Extended Game Theory -- Game Theory Encourages Peace -- International Accords -- Game Theory as Part-and-parcel of Social Science -- The Game Theory of the European Union versus the Pax Romana -- Playing the Game of International Law -- Mutual Threat: The Game of the Cold War -- Equilibria in Games of War and Peace: Options for Cooperation -- The Game not Chosen: Equilibria of Games about Games.