Cold wars are just as bad as hot ones...
For some reason you think that the next war, should be a Cold War. BAD, BAD, BAD, IDEA! I'll get back to that in a minute but first I have to reply to the first slight problem I have.
Nuclear war is still a very tempting proposition. The US and Russia, democratic or communist could end up killing each other. Recently Russia has lifted sanctions against Iraq for cheaper oil. In a far stretched scenario we got to war with Iraq again, and while doing that endanger cheap oil going exclusively to Russia. Russia gets involved to protect their ass, things escalate with trigger happy generals on the Russian side, trained to kill America during the Cold War, and kablewy. End game.
A nuclear war on a smaller scale, between second-or third world countries will happen. They have in a way less to lose, and are generally stupider, and more anxious than the first world countries. In 30 years India, and Pakistan will go at it or India, and China, or a countless number of other countries. This will be horrifying to my generation which was born during the last few years of the Cold War, with no understanding of nuclear annihilation.
About the Cold War thing. This is a horrible idea. A Cold War is just as bad for a country as a hot one. A Cold War uses subversion, fighting between third world countries as battle fields, Vietnam, Korea. If the Cold War would have lasted another thirty or fifty years, America would have destroyed itself. Personal freedoms could have vanished, making us a police state, and the military could have begun to exercise control over the civilian government. The Cold War destroyed Russia, more specifically the arms race, it could have happened to the States just as easily.
This more importantly is why the individual can't remain number one, we most work with each other, fellow humans and nations to promote peace. If we don't things could get real ugly, real fast.