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Without reading too deep into what other people posted in this thread, I like to post my own theory:
The only studies on IQ vs race where the study objects grew up in a somewhat similar environment have been made in the USA. Whites got a score around 100, blacks around 85 and yellow around 105. While there is a slight chance that these figures might represent the race as a whole, there is also the chance of the following scenario, based on historical migration patterns:
White people who emigrated to America came from all classes and were thus expected to have an average IQ.
Black people who were captured as slaves were not the elite of their tribes. They might even have been sold by their own tribe leaders in some cases. So the smartest Africans stayed in Africa.
Yellow people who emigrated to America have to a large extent been the most skilled in their society.
As mixed-race marriages are less common than same-race marriages, these features have been genetically passed on for several generations.
The only studies on IQ vs race where the study objects grew up in a somewhat similar environment have been made in the USA. Whites got a score around 100, blacks around 85 and yellow around 105. While there is a slight chance that these figures might represent the race as a whole, there is also the chance of the following scenario, based on historical migration patterns:
White people who emigrated to America came from all classes and were thus expected to have an average IQ.
Black people who were captured as slaves were not the elite of their tribes. They might even have been sold by their own tribe leaders in some cases. So the smartest Africans stayed in Africa.
Yellow people who emigrated to America have to a large extent been the most skilled in their society.
As mixed-race marriages are less common than same-race marriages, these features have been genetically passed on for several generations.
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