No, it's biblical. There is only one race, according to the Bible (Acts 17:26, among many other passages). This is allegedly a Christian site, yet there are people pushing the idea that people of various ethnicities are fundamentally different. There are minor biological differences in persons of different ethnicities, but different ethnicities are not necessarily persons of significantly different skin color. And intelligence, once one accounts for social conditions, is fairly evenly distributed throughout humanity.
You seem to think that longstanding societal oppression, privilege or expectations have had no effect on the achievement of children born into the social strata of our society. That's false. And that doesn't simply occur along racial lines, it occurs across economic lines and even among persons of certain cultures, like Louisiana Acadians (Cajuns). I grew up in a blue collar town among LOTS of Cajuns, and the schools saw their role as preparing us to work in the refineries. There was not much emphasis upon going to college, and Cajuns who had mild Acadian French accents were often thought to be less intelligent than the rest. We only had one black student in any of my schools the entire time I was in K-12, and she was a sophomore when I was a senior in 1984, since schools in my area were heavily segregated. Desegregation came to my part of Texas in 1982, when the Beaumont ISD was required by a judge's order to integrate their school district.
So I know a little bit about this issue from personal experience.