MadNomad
As i live and breathe
there is alot of the brain we dont understand which is an organ. height is obviously quite different. The only study id believe if people of different race are compared from birth and brought up exactly the same way in a controlled environment. But obviously you cant do that its child abuse
No such study needed really to make an educated guess. Just look at the world. Some are busy with cutting off female genitals and bombing themselves, while others are sending rockets to Mars and revolutionizing technology every 5-10 years. There's an obvious hierarchy here.