You word was "race." Of course their are variances in phenotypes based on location, but that is to be expected from natural selection.
Beyond that, everything else of significance is entirely socially defined.
Yes, I said race, not species. You're the one who brought up us all being Homo sapiens sapiens, which is irrelevent. We do know that there's physiological differences between different populations and that results in some general differences in ability and perhaps even behavior. We know that physiology does have an impact on ability and behavior (such as that Kenyan tribe, the Kalenjin, that dominates much of the world's long distance running competitions). The only real question that remains is how much of an impact it actually has and how much of it is determined by other things.
But racial differences are politically incorrect to admit to existing, especially if you're a scientist. For example:
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The Role Of Genetics
Scientists and sports gurus have proposed all sorts of explanations over the years for
Kalenjin prowess on the track: from their high-starch diet, to the altitude, to socioeconomics.
All those factors are important, but none of them explain why this particular tribe is so dominant. That left Epstein when he was writing his book exploring a more controversial line of inquiry: Is there something genetically different about the Kalenjin that makes them superior runners?
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Kenya's Wilson Kipsang set a world marathon record when he won the Berlin Marathon on Sept. 29 in 2 hours, 3 minutes and 23 seconds. He is Kalenjin, a group that has produced many of the world's best distance runners.
John MacDougall/AFP/Getty Images
Asking that question almost convinced Epstein to back out of his book contract. He realized he'd have to address sensitive questions of ethnic and racial differences. Academics told him they had evidence of genetic advantage but wouldn't share their research with him for fear they'd lose their jobs. "And these were professors with tenure," he says.
But some scientists did talk to him; and they explained one aspect of innate biology that clearly helps Kalenjin: the shape of their bodies.
Kalenjin have particularly thin ankles and calves, a body build common to Nilotic tribes who grow up near the equator. Epstein says this is particularly important in running because your leg is like a pendulum. The more weight you have farther away from your center of gravity, the more difficult it is to swing.
If you take a runner and put 8 pounds of weight around his waist, he can still run reasonably well. But if you put those same 8 pounds in the form of two 4-pound weights around his ankles, that will take much more energy and slow him down considerably.
Epstein says body type confers its greatest advantage among elite athletes, where other differences — in training, in aerobic capacity — are minimal. In fact, he says if you were to go to the Olympic starting line and measure everyone's ankles and calves before the race, you could predict, statistically, who's likely to win."
I mean, seriously. That "blank slate" crap has been disproved decades ago. But certain political ideologies are founded upon it, so they must keep living in la-la land to keep their failed ideology going. It's gotten so stupid that professors feel that they can't talk about a Kenyan tribe having thinner ankles and calves? Wtf?