Wow it's almost like racism is systemic.

It's pretty wild how you can show lower achievement scores for any countries definition of "black" while changing who belongs in that group.

For instance, Italians were considered black in the early 1900s and wouldn't you know it, there was an achievement discrepancy for Italians so long as that definition held.

Or you can look at apartheid and post apartheid South Africa - when the political structure flipped, so did the academic scores of the groups.

The discrepancy follows the social category and power asymmetry and not the actual people. It's a social artifact, not some biologically inert trait.