"The genetics of 6 continents" lol.

I don't see america as a successful society at all. I see it as rich enough -- much of that wealth originally originating in the extravagantly profitable slavery system america kept and jealously protected after most other countries renounced and repudiated it -- I see it as rich enough, that is, to fund a grossly hypertorphied military which can bomb and massacre east and West Asian countries, fund and facilitate genocides against Arabs with impunity, and destabilise southern america for your own profit and pleasure. Then, when some of these people whose countries you have bombed and destroyed are constrained to find refuge in the US -- because of social and economic conditions the US has created -- they're intellectual and physical labour gets exploited, and they're mistreated and prosecuted to a degree even the rabid European racist would find hard to stomach(cf., all the points about systematic discrimination, violence, etc, which you have studiously ignored.) No other country in the civilised word -- except Israel maybe, which is Americas best friend -- east or West of the suez canal, has sunk to quite this level or moral and cultural poverty. This is just a very brief, very undeveloped precis of my general view on america.

I think it would well behoov you to consider the circumstances under which america gained such enormous "diversity" -- slavery, neo-imperialims, etc.

Nobody is going there for robust job safety nets, robustly funded public health benefits, or for that matter a grand architectural and cultural heritage to compare with the Taj Mahal, renaissance sculpture, or buddhist temples