[ISiddiqui]

Only one group of people were systemically ripped from their homelands for a few centuries to work in servitude - the folks from East Africa. This tended to cripple both East Africa and those millions who were shipped across the Atlantic. 400 years of servitude with no ability to build wealth (and that wealth taken by the dominant group - whites), followed by a 100 or so more years of oppressive behavior dedicated to prevent their success, and you have what, 50 years of somewhat legal rights? That's well behind in building up wealth. And poverty tends to hurt familial strength (look at white Appalachian areas where the opioid epidemic has hit hard). And of course there is continued attempts to deprive African-Americans to get ahead - the War on Drugs was prosecuted in an incredibly biased way (all of the statistics show whites and blacks do drug the same, but blacks are far more likely to be arrested and prosecuted).

All the Japanese people you see today aren't descended from the ones who were interned. Quite a few came over afterwards, taking some of the wealth from their homelands.