I checked out the world IQ map, and there are no surprises. It explains a lot. It raises the question, “Why do low-IQ non-achievers blame their failures on the high achievers, and expect to get paid reparations for them?”
You ignore the failure of the urban public school system nationwide, the easy (and mostly legal) availability of the mind numbing drug marijuana and the excuse of “systemic racism” as reasons for this anomaly. Look at a kindergarten class of black kids, they are happy, active, ready and willing to learn. Look at that same class in ninth grade.