In the next 150 years that this may become less important to most. Once, in a genetics class, I saw it mathematically demonstrated that almost everyone is everyone else's 23rd cousin.

Even 500 years ago, most people still lived and died in a radius of 100 miles or so. Suddenly, explosively, post industrially, this is diminishingly true. Next 150 years this mixing could be expected to accelerate at least some.

Tribal pride is ok I guess, but what we're measuring in IQ tests doesn't seem to be showing huge variations between populations, when adjusted for environment and education. How important are the remaining differences? I feel that we primates with our short life spans arguing about IQ's and IQ tests could be compared to monkeys playing tricks, demonstrating and throwing offal in bids for tribal status.

Maybe there is a difference between a smart primate and a dumber one. But its not much of a difference. Nutrition, emotional environment and education are big players.