Pretty much. Their main geopolitical rivals in Europe imploded thanks to WWI and WWII. Had Europe not levelled itself, the USA likely would never have caught up

Pretty much. Their main geopolitical rivals in Europe imploded thanks to WWI and WWII. Had Europe not levelled itself, the USA likely would never have caught up in terms of economic superiority, and the USA would've remained a strongly isolationist middle power. (Now keep in mind that the prospect of a peaceful 20th century Europe is unrealistic. Europe was a warring tinderbox at the time, and even if WWI and WWII had not happened, a conflict of similar scale likely would've broken out in Europe regardless. Any number of destructive conflicts could've broken out, including a Soviet invasion of Germany and Western Europe. In short, it's really hard to construct a timeline where the USA wouldn't have been catapulted into superpower status due to war in Europe)