history books in a hundred years will read:
"Then the US invaded Iraq, which is why there is still conflict there today. Many historians agree that threat of US invasion is what pushed Iran and North Korea to develop a nuclear weapons program. By all logic, it was the only available deterrent to Western Capitalist invasion. And that of course led to the second cold war, which of course wasnt all that cold, and hence we all live underground now."
on the plus side, post-apocalyptic futures always end up looking really cool.