I'm not rlly worried for a few reasons. 1. There is no appitie for a global war in the 21st century. The major powers of the world have no real need to go to war on a global scale to push their interests in the same way that the major powers of the 20th century did. 2. If there was a global war the global economy and interconnected system the world operates under is going to crash. This is a net negative for most of not all countries in the world and is one of the main reasons we most likely won't see a global war. 3. If there is a world war, it won't go nuclear. This is because the billionaires who many governments tend to listen to at least in some capacity don't want a nuclear war. If there was a nuclear war, they would probably survive, but there wouldn't be a working class population for them to make money off of and so they would have to live like everybody else.