The scenario you describe is really one more common to the modern world of just the past couple generations. Intelligence has been evolving and subject to inhe

The scenario you describe is really one more common to the modern world of just the past couple generations. Intelligence has been evolving and subject to inheritance far longer than that. Believe it or not, the scenario you describe has occurred to researchers as an avenue of study, and they found it didn't amount to much(i.e. nature over nurture), see 'twin studies.' This subject, intelligence, is really one of the triumphs of 20th century science, in that it has come to be quite well understood. It's understandable that you and so many others seem unaware of this, however, because to quote Steven Pinker, 'people hate the message.' https://twitter.com/sapinker/status/645301814955388930 https://twitter.com/sapinker/status/645301814955388930 Also, you may consider abandoning this notion of genetics and culture being in an uncorrelated relationship. Cultures are simply people, that is they are emergent from the interactions of people, and since there are high IQ people and low IQ people, there are high IQ cultures and low IQ cultures.