Boas’s Changes in Bodily Form: The Immigrant Study, Cranial Plasticity, and Boas’s Physical Anthropology. AMERICAN ANTHROPOLOGIST 105(2):326–332
The sleazy language says it all - the only thing boas intended was to show that genetics did not play 100% role ...
Sure. And jews didn't make up to 50% in the highest Cheka ranks in 1918 - they were poor victims of Russian antisemitism... Stuck your advice into your throat.