> Both World Wars, should have just be reduced to fighting between Germany, Russia and Japan. <
You sure are right about WW1. Had the UK and the United States stayed neutral, the world would be a far different and far better place today.
Given that Hitler and Tojo were infinitely worse than Wilhelm II, neutrality in WW2 would have been an error. But, hey. Had WW1 turned out differently, there would have been no WW2!
Britain and France couldn’t handle the fact that there was a new kid on the block, when Germany united in 1871.