During WW2, a good percentage of the developed nations were at war with each other. Nazi Germany declared "total war" when Hitler realised they were losing. Jap

During WW2, a good percentage of the developed nations were at war with each other. Nazi Germany declared "total war" when Hitler realised they were losing. Japan refused to quit until they were shown the true power of nuclear weapons. Countless lives were lost and resources consumed. But despite this, 70 years later we are still here and most people in developed nations live very comfortable lives. Forgive me if I'm a little sceptical about any prediction beyond 5 years...