This is a very important conclusion about complex trait inheritance. In a similar vein, there is a growing number of supporters of the theory that some countri

This is a very important conclusion about complex trait inheritance. In a similar vein, there is a growing number of supporters of the theory that some countries are poor because their population or certain ethnicities have lower IQ due to genetics and not because of environment and culture that suppress proper development of children. To me it doesn't seem likely because intelligence similarly to schizophrenia is a complex trait or even more so. The deficiency of intelligence genes is refuted by the fact that children of immigrants in rich countries will be equally intelligent. And even if a certain country experiences brain drain, the effect on the population will be short lived. The culture and environment are the best explanations as even in rich countries some groups can be disadvantaged due to perpetuated inequalities that affect child development.