I feel that your interpretation of events and motivations is way too cynical.

I certainly don't have any good reason to feel optimistic about the past, present, or future of this imperialist, settler-colonial, capitalist nation which would rather start WW3 than give up a shred of its post WW2 hegemony.

given the advancements in technology, medicine, arts, and so on that could not have occurred in a different society.

What supernatural qualities does the United States have such that, were it removed from history, a bunch of "technology, medicine, arts and so on" would have never been invented? Take the nuclear bomb for example. An American invention. Had America never existed, it still would have been invented, eventually, just somewhere else. Splitting the atom would have occurred to some physicist eventually. Using it as a weapon would have occurred eventually. I'm a staunch materialist about these things. America is just a geopolitical construct. Everything invented in America, by Americans, could have been invented somewhere else, by someone else, under similar circumstances. Technology comes about because a need/desire for it arises, and the materials to create it are available. Not because of the supernatural qualities of the nation.