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It's a review of Plomin's book, Blueprint, including putting it into context with the history of similar works. "Like much of that literature, Blueprint plays fast and loose with the concept of heritability. Sometimes Plomin treats it (correctly) as a variable property of a population in a given environment. As population geneticist Richard Lewontin pointed out in a scathing critique of Jensen’s approach in 1970, in times of plenty, height is highly heritable; in a famine, much less so (R. C. Lewontin Bull. Atom. Sci. 26, 2–8; 1970). But elsewhere, Plomin, like Jensen, treats heritability wrongly as a property inherent in a trait." ... "The most troubling thing about Blueprint is its Panglossian DNA determinism. Plomin foresees private, direct-to-consumer companies selling sets of polygenic scores to academic programmes or workplaces. Yet, as this “incorrigible optimist” assures us, “success and failure — and credit and blame — in overcoming problems should be calibrated relative to genetic strengths and weaknesses”, not environmental ones. All is for the best in this best of brave new worlds. "Plomin likes to say that various components of nurture “matter, but they don’t make a difference”. But the benefits of good teaching, of school lunches and breakfasts, of having textbooks and air-conditioning and heating and plumbing have been established irrefutably. And they actually are causal: we know why stable blood sugar improves mental concentration. Yet Plomin dismisses such effects as “unsystematic and unstable, so there’s not much we can do about them”." |