Blacks have sun resistant skin, as a result they are not able to produce much if any vitamin D via the sun. Blacks are less intelligent, as a result they had to run from enemies instead of using weapons. Whites had to use weapons to hunt, as a result we developed larger chests. Bow and arrow hunters developed curved forearms. . Heat dissipation. White people are adapted to survive cold, which means greater mass to surface area ratio, light skin for vitamin D, and higher IQ. People who are adapted to live around the equator have a greater surface area to mass ratio, are longer, and have pigmentation to protect against excess sun, to deal with greater heat. Irish slaves were considered expendable and given the more dangerous tasks, as they were like 1/6th the expense of African slaves, due to the heat the African slaves could handle. Any engine must contend with heat dissipation to work well. If you can't work harder, you have to work smarter. Plus, contending with changing seasons requires ability to forgo now for future benefit, or delayed gratification. Anyway, especially when it comes to basketball, it makes perfect sense that people who live around the equator would be advantaged by their adaptation. The gravity is higher at the equator which would require more dense bones to run around., they would then jump that much higher when away from equator. Ever wonder why there have been so many black athletes who drown?