Why would a liberal pub like Slate publish a series on “Created Equal”?

[jody]

Liberal Creationism

Last month, James Watson, the legendary biologist, was condemned and forced into retirement after claiming that African intelligence wasn't "the same as ours." "Racist, vicious and unsupported by science," said the Federation of American Scientists. "Utterly unsupported by scientific evidence," declared the U.S. government's supervisor of genetic research. The New York Times told readers that when Watson implied "that black Africans are less intelligent than whites, he hadn't a scientific leg to stand on."

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I'm for reconciliation. Later this week, I'll make that case. But if you choose to fight the evidence, here's what you're up against. Among white Americans, the average IQ, as of a decade or so ago, was 103. Among Asian-Americans, it was 106. Among Jewish Americans, it was 113. Among Latino Americans, it was 89. Among African-Americans, it was 85. Around the world, studies find the same general pattern: whites 100, East Asians 106, sub-Sarahan Africans 70. One IQ table shows 113 in Hong Kong, 110 in Japan, and 100 in Britain. White populations in Australia, Canada, Europe, New Zealand, South Africa, and the United States score closer to one another than to the worldwide black average. It's been that way for at least a century.

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In fact, there's a mountain of evidence that differential evolution has left each population with a balance of traits that could be advantageous or disadvantageous, depending on circumstances. The list of differences is long and intricate. On average, compared with whites, blacks mature more quickly in the womb, are born earlier, and develop teeth, strength, and dexterity earlier. They sit, crawl, walk, and dress themselves earlier. They reach sexual maturity faster, and they have better eyesight. On each of these measures, East Asians lag whites and blacks. In exchange, East Asians get longer lives and bigger brains.

How this happened isn't clear. Everyone agrees that the three populations separated 40,000 to 100,000 years ago. Even critics of racial IQ genetics accept the idea that through natural selection, environmental differences may have caused abilities such as distance running to become more common in some populations than in others. Possibly, genes for cognitive complexity became so crucial in some places that nature favored them over genes for developmental speed and vision. If so, fitness for today's world is mostly dumb luck. If we lived in a savannah, kids programmed to mature slowly and grow big brains would be toast. Instead, we live in a world of zoos, supermarkets, pediatricians, pharmaceuticals, and information technology. Genetic advantages, in other words, are culturally created.

Environmental Impact

One objection is that IQ tests are racially biased. This is true in the broadest sense: On average, African and Asian kids have different advantages, and IQ tests focus on the things at which more Asian kids have the edge. But in the narrower sense of testing abilities that pay off in the modern world, IQ tests do their job. They accurately predict the outcomes of black and white kids at finishing high school, staying employed, and avoiding poverty, welfare, or jail. They also accurately predict grades and job performance in modern Africa. The SAT, GRE, and tests in the private sector and the armed forces corroborate the racial patterns on IQ tests. Kids of different backgrounds find the same questions easy or hard. Nor do tests always favor a country's ethnic majority. In Malaysia, Chinese and Indian minorities outscore Malays.

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The best argument against genetics isn't in these studies. It's in data that show shrinkage of the black-white IQ gap over time. From these trends, environmentalists conclude that the gap is closing to zero. Hereditarians read the data differently. They agree that the gap closed fractionally in the middle decades of the 20th century, but they argue that scores in the last two to three decades show no improvement.

I've been soaking my head in each side's computations and arguments. They're incredibly technical. Basically, the debate over the IQ surge is a lot like the debate over the Iraq troop surge, except that the sides are reversed. Here, it's the liberals who are betting on the surge, while the conservatives dismiss it as illogical and doomed. On the one hand, the IQ surge is hugely exciting. If it closes the gap to zero, it moots all the putative evidence of genetic barriers to equality. On the other hand, the case for it is as fragile as the case for the Iraq surge. You hope it pans out, but you can't see why it would, given that none of the complicating factors implied by previous data has been adequately explained or taken into account. Furthermore, to construe meaningful closure of the IQ gap in the last 20 years, you have to do a lot of cherry-picking, inference, and projection. I have a hard time explaining why I should go along with those tactics when it comes to IQ but not when it comes to Iraq.

When I look at all the data, studies, and arguments, I see a prima facie case for partial genetic influence. I don't see conclusive evidence either way in the adoption studies. I don't see closure of the racial IQ gap to single digits. And I see too much data that can't be reconciled with the surge or explained by current environmental theories. I hope the surge surprises me. But in case it doesn't, I want to start thinking about how to be an egalitarian in an age of genetic difference, even between races. More on that tomorrow.

Is this going to be a key issue in the next presidential election? If not, what is Slate's goal?