Originally Posted by johnnyloadproductions

Yes, slaves were bred selectively for strength (man controlled evolution right there).

The average black man has more athletic endowment than the average white man.
The average white man has more intellectual endowment than the average black man (or has the patients to study to appear so).
Keep in mind there are always outliers and these are just averages.
This is all due to environmental circumstances engendered over thousands of years.

It's all the same reason why history's elite intellectuals come out of areas that had long winters or at least changing seasons that warranted extended duration inside at a study.
Winter forces people to plan ahead and make choices which selectively chooses those that can adapt to that environment.

This isn't me being mean or bitter towards blacks, it's just fact. Michael Johnson is right in his assumption (it's just not some athletic gene, but a whole assortment of different dna sequences).

If we all lived on a planet with 2x gravity, over some generations are bodies would probably get stockier, and undoubtedly stronger by default. Our muscles may even take on a denser structure and become more efficient due to the environment.

If this could all be redone by having a control group of whites live in Africa for thousands of years and only somehow breeding with only each other (kept from inbreeding though) and slowly they'd lean out due to the hot environment to dissipate the heat and it'd be favored for those whose skin was more brown to eventually completely black to provide a natural SPF toward the hot Sahara sun.