Some simple math here shows that one cannot believe in a purely genetic explanation for the gap between Africans & Americans and the gap between black & white americans. I don’t think Watson said he believed in a purely genetic explanation though. I would also note that environment is not always all that malleable, Judith Harris (author of “The Nurture Assumption”) discusses “non-shared environment” in “No Two Alike”, while genes may become more and more malleable with time. Attempts to raise IQ have not been all that successful, with Head Start gains disappearing after a few years, though efforts to introduce iodine into the diets of third worlders may work as they seem to have in the first world.
Some simple math here shows that one cannot believe in a purely genetic explanation for the gap between Africans & Americans and the gap between black & white americans. I don’t think Watson said he believed in a purely genetic explanation though. I would also note that environment is not always all that malleable, Judith Harris (author of “The Nurture Assumption”) discusses “non-shared environment” in “No Two Alike”, while genes may become more and more malleable with time. Attempts to raise IQ have not been all that successful, with Head Start gains disappearing after a few years, though efforts to introduce iodine into the diets of third worlders may work as they seem to have in the first world.