Environment does have it's positive and negative affects. But, I think it would be dangerous to try to select folk that you deem to have dominate
personalities and put them into homes where they are surrounded by the ills of the society. You can look at folk like Tupac, who describe himself as
a rose that crew from concrete, the situation he was born into affected him in a way that made his voice that much more powerful and destructive. I
guess it could go either way but it's kinda far fetched for me to believe that mass baby switching is taking place.
Bush Sr. and Jr. look so much alike, Jeb too. You can see HW in both of them.

