“I have never encountered anybody who claims that will, education, and culture cannot change many, if not all, of our genetically inherited traits. My genetic tendency to myopia is canceled by the eyeglasses I wear (but I do have to want to wear them); and many of those who would otherwise suffer from one genetic disease or another can have the symptoms postponed indefinitely by being educated about the importance of a particular diet, or by the culture-borne gift of one prescription medicine or another.” However, “If we have been raised and educated in a particular cultural environment, then the traits imposed on us by that environment are ineluctable. We may at best channel them, but we cannot change them either by will, further education, or by adopting a different culture.”