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"I was in some doubt that I could say anything to psychologists that would be both interesting and true. I then realized that psychology is a branch of biology for which the general problems of development are supremely relevant and that as a geneticist working at a time when DNA seems to dominate every mode of biological explanation, I could be useful to psychologyists if I could present the more sane truth about genes, environment and organism."
Clark University Press
Lewontin, Richard C., "Inside and Outside: Gene, Environment and Organism" (1992). Heinz Werner Lectures. 1.