Tod,The author states that polygynous wives have significantly fewer offspring than do monogamous wives, even after controlling for marriage duration, age of husband and wife, and use of contraception. The key factor seems to be coital frequency.Numish,I copied that map from one prepared by the American anthropologist F.S. Hulse a half-century ago. I suspect he was using a dataset that showed darker eyes in the Welsh and Cornish population of southwest Britain. The cline, however, is drawn too far east.Darker eyes are more prevalent among the Welsh and the Cornish |