by James Buchanan
For many decades, the average IQ for American Blacks was said to be 85. The average IQ of Blacks in Africa however is about 70 with several African nations averaging in the 60s.
While it’s true that the American Black population is actually racially-mixed or “colored,” the percentage of White genes in the Black population is only about 25 percent. In order to raise the Blacks up from an average IQ of 70 for pure Africans to 85 points, given that the White average is 100 and assuming the average IQ of a group is linearly related to their racial make up, the percent of racial admixture would have to be 50 percent for the colored population to have an 85 point IQ, which is not the case.
One source notes “When (Charles) Murray analyzed trends on the Woodcock-Johnson test, he found that Black men born from…
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