<A clear example of how a bad environment can hurt IQ can be seen in the IQ scores for sub-Saharan African countries. They average only around 70. In contrast, African-Americans average about 85. It appears unlikely that African-Americans’ white admixture can account for most of this 15-point gap because they are only around 17%-18% white on average,>
False. Which is not to say that bad diet/bad environment/toxicity doesn't stop DNA development to its optimum intelligence. Of course it does. But if anything, USA negro diets are probably worse than those in Africa, where they don't have supermarkets loaded with junk food.
In the 200 years since negroes were taken to America and in the breeding processes and selection processes leading to the current situation, it is easy to imagine that a 15 point improvement to 85 or even a 30 point improvement to 100 could occur.
It's not a matter of evolution so much as selection of those who go on to reproduce, and miscegenation.
200 years is 8 generations. That involves a LOT of selection process. In just one generation of 10 children, [common 100 years ago], most of them will probably have no or very few offspring. Do that 8 times and we could have a very narrow representation of the DNA of 200 years ago if there's a tendency built into the selection processes.
Maybe intelligence was heavily favoured in American negroes but not so much in African. Since women generally say they value intelligence in males [as one of the premium desirable characteristics], it's reasonable to expect that intelligence is a characteristic that increases rapidly as the dull blokes get left on the shelf.
It has always amused me that people have been convinced that all races are the same, when it's obvious that they are very unlikely to be, given their geographic separation for so long. They are different in height, colour, blood types, muscle types so it's not exactly surprising that they are different in brain functions too.
Mqurice |
