Russia 0o lol good one dude Only because our economy sucks it doesnt mean we aint running the show. Iran and russia are non factors in having any big effect on a world war. Personaly i think china could give the us a run for its money but why would they even consider it when they dont have any strong allies. Iran and nkorea aint **** even with their nuclear weapons. The us already saved the world once and if it was ever in danger again we would come to the rescue again. If u dont believe me ask ur teacher how come u aint german.