>>508429513
I don't think the ones that got sold are necessarily of different or inferior genetic stock than the other Bantus. One tribe might just have been ganged up on, or they were more affected by drought than their neighbor and thus weakened.

Descendants of slaves seem quite physically fit, if sports achievements are any indication.

The ones in Africa have a better attitude and more self respect though. They've been successfully reclaiming their sovereignty, while African American's are perpetual victims forever trapped in the white mans world.