I had a history professor that came to the same conclusion about having 7 “world wars”.He also came to the same conclusion about the timeframe of wars. Very good and astute!!
I read once that before WWI, social scientists predicted that it wasn’t a matter of, ‘if,’ but ‘when’ a war would happen and the only unknown was what would trigger the war. All the major powers at the time had built up navies, their military, and had so many intricate alliances that one attack by even a minor country against another minor country would trigger mobilization by the greater powers.
I think that something is going to happen, but I don’t know over what and when. Who knows really.