WW2 was merely an extension of WW1. WW1 has cast it’s long shadow on the issues before us today.
WW I proved the end of the 19th Century and started the bloody 20th that took the lives of Millions via, conquest, war, communism and fascism. Only one winner of this folly—the USA. As top dog on the planet, we replaced the British Empire and, sadly, I don’t think we have done as well running things as the Victorians of old. To rule the world a dominate nation-state must become right bast*rds, heartless as the Ancient Romans in the Ancient World. Its not in our nature to be the murdering, feared, masters of the world. The Islamic people see we have no heart for it and use our humanity in a bid to take the crown from us (Yes, they can be cruel masters—just look at ISIS). America must step up or hand the crown to another nation—China? Russia?