Our own Judgement Day will most likely spring from uncontrolled, unsupervised, military research into fire and forget automatous weapons, like drones and robots. Once an enemy is on the ropes, all will be fair, and that will of course include Nukes. Either we embrace the rule of law, or we are subject to the law of the jungle, and of course, America, at the food chain today, won't be there forever.
Evil and greed sure do together, thinking of the fossil fuel monsters and the big tobacco criminals who bought politicians left and right. They may have destroyed our civilization, but global warming won't be killing many for another couple of decades is my guess. Still, warm water expands so Florida, for example, is losing coastline by the beach...