DNA and Intelligence, again
The topic, it seems, is not going to go away anytime soon.
When scientists first decoded the human genome in 2000, they were quick to portray it as proof of humankind’s remarkable similarity. The DNA of any two people, they emphasized, is at least 99 percent identical.
But new research is exploring the remaining fraction to explain differences between people of different continental origins.
. . .
At the same time, genetic information is slipping out of the laboratory and into everyday life, carrying with it the inescapable message that people of different races have different DNA. Ancestry tests tell customers what percentage of their genes are from Asia, Europe, Africa and the Americas. The heart-disease drug BiDil is marketed exclusively to African-Americans, who seem genetically predisposed to respond to it. Jews are offered prenatal tests for genetic disorders rarely found in other ethnic groups.
Such developments are providing some of the first tangible benefits of the genetic revolution. Yet some social critics fear they may also be giving long-discredited racial prejudices a new potency. The notion that race is more than skin deep, they fear, could undermine principles of equal treatment and opportunity that have relied on the presumption that we are all fundamentally equal.
It has never been so much that we are fundamentally equal as it is that we should get equal treatment. Equal pay for equal work. The same punishment for the same crime. In simple terms, that you get judged on your merits and actions and not other factors beyond your control. It has never actually worked that way, but that is the ideal.
I was going to launch into another screed about racism and so forth, but I covered most of those arguments back when Watson made his less-than-PC remarks about blacks.
To summarize; we have neither a good measure nor definition for intelligence, so linking it to DNA and making racial comparisons based on that is beyond ridiculous at this point.
Now, the article speculates that we may find a way around that issue in the future, which is entirely possible, but that makes, or should make, no difference to any legal frameworks regarding discrimination.
So long as it is only a statistical measure, it is both unfair and wasteful to hold whole segments of society to their average scores.
The problem is the same one any kind of aggregate discrimination runs into. What’s true of a group doesn’t translate into being true for the individual. Take the quite factual statement that in the US, whites are richer than blacks. There’s no dispute about it, and whole programs and polices get based on it, (about those there is dispute).
Now, pick two individuals at random, one from each group, and tell me which one is richer? The average is useless at the individual level.
Of course, wealth isn’t, (or shouldn’t be), based on your genes, and intelligence, or at least its potential, probably is, but the variations in its level within population groups will still hold true. Even if, by some strange chance, whites turn out to have the best cards in the intelligence pool, there isn’t any shortage of stupid whites to go around. (Check the blogosphere, you can’t swing a dead cat around without hitting one. In fact, their preponderance gives me serious doubts regarding how well we’d place.)
Further, the differences between populations must be incredibly small or we wouldn’t be having the debate.
Think about it for a moment. All of the other genetic “discoveries” mentioned in the NY Times article; skin and eye colour, disease susceptibility, and other physical traits, were long known to have a genetic basis before people began mapping DNA to find the specific pieces.
Linking intelligence to populations that way, on the other hand, has always fallen apart whenever external environmental factors get taken into consideration.
So even if we do find racial markers linked to intelligence, it won’t be of any rational use for discriminating amongst individuals, (not that prejudice has ever been a rational exercise; more an exercise in rationalization).
Anyway, the real interesting moral questions come down the road when this sort of research gets applied to individuals. Job selection based on your genetic code is already the stuff of (mostly) bad sci-fi, and the idea of using genetic information to deny insurance coverage is already here. But what about pre-screening embryos and aborting those that don’t measure up? Sterilizing the less intelligent to improve the gene pool?
All the ugliness of the Eugenics movement, but this time with clear, empirical, scientific evidence to back it up?
That’s something worth thinking on.
