You think people were asking if WWII was gonna happen after WWI? They saw it coming from a mile way.
That was because we pushed Germany into a corner where they faced eternal poverty, so they got aggressive and grew out of the tight bounds that we set.
I personally don't think WWIII will start as long as the U.S. and Russia still have brown people to shoot, and if Korea unifies, it will be even less likely. I'm hoping that we can get a colony to mars before the royal rumble starts, though.