In a day or two I will write a review of The African Origin of Civilization: Myth or Reality. While you wait for that, in referring to a seminal work, Race et Intelligence, he writes, quoting Jacquard

determining intelligence with IQ is as ridiculous as confusing rectal temperature with health. The real problem is to understand why some people pose this question. Their true aim is to justify social inequalities by means of alleged natural inequalities.

Diop,Cheikh Anta. Civilization or Barbarism, pg65