They haven't had a couple of millenia of contact with Greco-Roman Western Civilization and Christianity like the Scots, for example, have. A lot of European ethnic groups didn't join Western civilization until fairly late in the game and some still haven't gotten their act together and still act tribally (e.g., the Balkans). Believing that all of Europe embraced Western Civilization quickly and painlessly is as wrong as believing that all black people are culturally identical in Africa.
Also, aren't Indians genetically closer linked to Africans than Europeans?
It's their stinking indigenous governments that have kept them down for so many centuries -- with periodic assists throughout history from racist, exploitive European governments.
I suspect that America would be a better place if we could replace -- with African (legal) immigrants -- our growing population of illegals from our neighboring countries.
National prosperity and level of civility isn't simply a matter of race. It's one of cultural values and personal pride....