Dang it. For the umpteenth time, there is no such thing as a white race or a black race. There's only one race; the human race.
The whole concept of blacks being of a different race is derived from Darwin's "Origin of Species".
Charles Darwin came up with the idea that blacks were beings inferior to humans, not just whites.
There are genetic differences in geographically disparte groups of people. They can be traced for a long time.
Obviously, the genetic differences are not major, ass all races can interbreed successfully.
However, there are measurable differences. Some races are better at some things than others. It is unknown how much is genetic, how much is cultural, but there are differences.