This is a very interesting piece.
Hereditarians often say that the B-W IQ gap has been flat for 100 years, evidence that it it genetic. However, this flies in the face of evidence. For instance, Africans have IQ’s of 67. Caribbean Blacks, with 9% White in them, have IQ’s of ~71. Yet American Blacks, with only 15% in them, have IQ’s of 86.8. If we went by White % alone, US Blacks would have IQ’s of ~72.5. So we have 14.3 IQ points in US Blacks that is not explainable by % of White blood.
As the article makes clear, the B-W IQ gap was reduced by 7.5 points from 1920 to 1970. Since 1970, Blacks have reduced the gap a small amount, by 1.8 points. So in 1920, US Blacks had IQ’s of 77.5. It’s quite possible that earlier, their IQ’s were even lower. This needs to be taken into when reading older lit by White Americans about the stupidity of Blacks (Thomas Jefferson’s observations).
Going back a century or more, US Blacks were indeed not very smart. This low intelligence may be reflected in the relative lack of inventions, scholarship, etc. However, now, with dramatic rises in the US Black IQ, we should see a lot more Black inventiveness and scholarship than we saw in the past.
This piece adds support to my previous piece showing dramatic changes in Black skulls since 1900. Black skulls have become much larger, and resemble White skulls more. Some of the changes were due to diet, but others were due to genetics (selective breeding). Hence, since 1900, US Blacks have been selectively breeding with Whiter features and higher IQ. This goes directly against popular cant about dysgenic effects in modern society. With US Blacks, to the contrary, eugenic, not dysgenic, effects have been operative for some time now.
Hereditarians may wish to quibble with this research, but the author is Charles Murray. While Murray takes a strong hereditarian POV, at least he is honest.