Although the vast majority of the angry responses greeting my Race/IQ article focused on a few of the ethnicities I had examined—Irish, Mexicans, Italians—my coverage had actually been quite broad, and I presented a large number of IQ gaps whose existence seemed inexplicible from a strictly genetic perspective.
Indeed, the first example I cited was the case of Germany, which showed a consistent IQ gap of 5-10 points between East and West, despite the two populations being genetically indistinguishable. Since Communist East Germany was dreary but hardly suffered from Third World levels of malnutrition or physical deprivation, I argued that a biological cause was unlikely, and that the difference was therefore almost certainly due to socio-economic or cultural factors. Naturally, my critics either ignored or ridiculed my analysis. The central argument of my piece had been that although GDP and IQ were highly correlated, the direction of causality might well be from the former to the latter, and this attracted much derision. Continue reading