In the 1983 issue of Nature (303:522), J.A. Beardmore and F. Karimi-Booshehri
reported that, based on a study of a specific British population, A-blood groups are significantly more common among the higher socio-economic groups. As one might predict whenever someone asserts that human success is genetically determined, an avalanche of mail descended on the Nature office. Two other studies that did not show the blueblood effect were offered, although somewhat different populations were involved. Many letters tried to find an explanation for this anomaly in the constitution of the sample. By the time one got to the response by the authors, the whole issue was clouded.
(Mascle-Taylor, C.G. N., et al; "Blood Group and Socio-Economic Class," Nature, 309:395, 1984.)
