Comment Re:I don't get it. (Score 2, Interesting) 541
First, you can take sample populations that 'exclusively possess" a particular feature, and they turn out not to. That is, it may be common for Danes to be blonde, but you can look at a large group of people from Denmark and see many people who don't have blonde hair, or otherwise don't fit whatever model of how that group should look someone is offering. You can try to filter your sample, for example, looking only at people who have records of descent from natives to that area going back five or ten generations, and that still will give you a population that has many exceptional examples wo don't have all the features you think make up a race. This happens near universally - you can go to more isolated villages or look at whole regions where it is believed the inhabitants lived cut off from other races, and you will still find that there are lots of exceptions. You can test this with 'extreme' examples - If you look at 100 Zulus, maybe half will look like stereotypical Zulus, and there will be 10% that are atypically short, lighter skinned, broader faced, narrower nosed or even with a "roman" nose, etc. (And it won't be the same 10% for each feature). Yeah, you're probably not going to find a blonde Zulu with epicanthic folds that stands 4" 3" as an adult in a sample of just 100, but you will find a lot of people who look not quite like what the standard model Zulu (or Polynesian Islander or Aboriginal Australian is supposed to be.
Second, those physical racial features have mostly evolved over periods as short as 10,000 years. You can find cases where they may have had longer periods of isolation, but even those are pretty short as regards human evolution. For example, the best estimate for when proto-Asiatic ancestors of the Native Americans crossed the land bridge between Siberia and Alaska might be as high as 20,000 years, but most ethnolgists think that, a) people kept following along on that same route until much more recently, and b) the various Pacific peoples also made it to the New World sometimes by oceanic routes. So, even the differences between a 'typical' North Korean and a "typical" Cherokee probably accrued over less than 10,000 years. (And the differences between "atypical" ones of each group? They took the exact same total time. Try to visualize that.). That's set against an evolutionary history of roughly 100 times as long for the development of tool use, fire, and other innovations that show original thinking, invention, creativity, general intelligence and what some people still call progress. The genes that let some of our ancestors figure out how to make a better clay pot than the last design have been steadily circulating among populations and leaving behind artifacts in all cultures. If those genes are still very rare, then the claim is that genes for being smart, creative, and adaptable don't have any better survival value than the others, as they get into populations the same ways as the genes for short Zulus, but somehow, they are not being selected for, over periods 100's of times as long. In fact, it's a claim that creative intelligence has negative survival value.
The reason this "science" on racial differences is nothing but good old fashioned racism follows from these two points. The argument becomes "Intelligence has no survival value. Nature selects against it except under very special circumstances such as Ice Ages. Inferior genes water down the superior ones unless the superior ones are kept isolated from them." Ultimately, this becomes the "one drop of black blood makes you black" argument of the Civil War era American South. And none of that, from the claim that bad genes can water inherently good genes down until they vanish, to the echoes of apologetics for American slavery, is science.