The Jews once had high (but not exclusively high) rates of Tay-Sachs disease. Now they do not. Some Jews have ginger hair and pale skin, just like plenty of Scots. Others do not. The skin tone of the people of the Andaman Islands is very similar to that of the people of central Africa, but they acquired that hue via different historical and biological routes. Some black Africans are evolved to process oxygen at high altitudes, as are some Tibetans, but most are not. “Black” is no more a race than “long-distance runner” is.
