| "it's true that to a certain extent different ethnic groups have genetic differences of medical relevance." It's just plain true. "While variation within groups is generally larger than that between groups" That line is for the big traits, like intelligence, strength, etc. Those are made up of many, many genes, and I've even seen a couple of recent articles that suggest the answer to the question "which genes affect intelligence?" may well be "all of them". When it comes to specific genes, though, the incidences can be correlated very strongly to ethnicities/races. If you're having trouble squaring that with your political pieties, bear in mind that it's actually all correlations, not causations. The real cause of the genes an individual has is their literal ancestry (i.e., not their "race" but their exact ancestry, the exact humans and indeed even the exact genes carried by the relevant eggs and sperms), and it isn't that surprising that that correlates strongly with something else that is very tied to ancestry. But really, it's a separate process. There is a de-novo genetic mutation my wife has. She didn't get it from either of her parents. (You know what I mean.) The races of all the individuals involved have nothing to do with the fact that one of our children also has it and one does not. It's sort of important that we not freak out about "races" showing up in medicine; is it more important that people get correct medical treatment and live better lives and at times just plain live even if we can only use a crude tool for a while, or that our particular delicate political beliefs be left unchallenged? I know which I choose. |