I really am not impressed with arguments that you can’t measure the inheritance of intelligence because the individuals don’t share a common environment. If thi

I really am not impressed with arguments that you can’t measure the inheritance of intelligence because the individuals don’t share a common environment. If this was true you would not be able to do any genetic studies on any trait. The more important question is how much shared environment contributes to the variation in intelligence between individuals and the answer to that is basically zero.