The Khoisan Race: The Bushmen of the Kalahari - Evolution, history and intelligence
Hello all, it is time to look at one of the least populous and least intelligent genetic clusters that are human, the Khoisan Race: otherwise known as the Bushmen.
This is an extract from: Race Differences in Intelligence: An Evolutionary Analysis by Richard Lynn.
"It appears to have been around 100,000 years ago that some groups of archaic sub-Saharan Africans from equatorial East Africa began to migrate south, where they evolved into the Bushmen; they came to occupy most of southern Africa, but only a few tens of thousands of them survive today in the Kalahari Desert. During the last 100,000 years, the brain size of the Bushmen increased by approximately 10 percent to 1,270cc, at which it stands today, and their IQ increased to 56. The climate in southern Africa is warm and temperate with slightly cooler winters than in equatorial Africa. Nevertheless, the Bushmen were able to survive largely on plant foods, insects, and eggs, as they do today. It has been reported by Ann Brower Stahl (1984) that Bushmen eat around 90 different plant foods and these constitute 70–85 percent of their diet. More recently, William Leonard (2008) has noted that the Bushmen have among the lowest levels of animal food consumption among hunter-gatherers."
Notably, although they lived in colder climates than sub-Saharan Africans, otherwise known as Negroes or Blacks, they have lower average intelligence which Dr. Lynn explains as being due to having a smaller population size. Remember that Eskimos also have lower average IQ than Europeans, despite living in colder climates and this is again partly explainable in terms of population size.
Here is a documentary that is posted on our YouTube channel about these people from National Geographic:
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