In my last column, I reviewed the findings of Butovskaya et al. (2015) on testosterone and polygyny in two East African peoples: - Testosterone levels were higher in the polygynous Datoga than in the monogamous Hadza. This difference is innate. - Datoga men were more aggressive than Hadza men on all measures used (physical aggression,... Read More

Humans differ in paternal investment—the degree to which fathers help mothers care for their offspring. They differ in this way between individuals, between populations, and between stages of cultural evolution. During the earliest stage, when all humans were hunter-gatherers, men invested more in their offspring with increasing distance from the equator. Longer, colder winters made... Read More

It sucks being young, male, and single. Don't think so? Go to the Interactive Singles Map of the United States and see how it looks for the 20 to 39 age group. Almost everywhere single men outnumber single women. And the real picture is worse. For one thing, the imbalance is greater among singles without... Read More

In my last post, I discussed the revelations from Rotherham, England. In a town of some 250,000 people, at least 1,400 school-age girls have been "groomed" for prostitution by organized gangs. Grooming begins with seduction by "lover boys" and ends in abduction, trafficking, and confinement. It is this final stage that apparently explains why some... Read More

Beyoncé Knowles, 2012. Is skin bleaching consistent with indigenous African values? (source) A Zambian-born sociologist visited his home village with his white American wife and two of their children. Having lost his way, he asked an elderly lady for directions. She gladly told him: But then she said, addressing his boys in the car, in... Read More

Squamous cervix cells covered with rod-shaped bacteria, Gardnerella vaginalis(source) Bacterial vaginosis is a common disease among reproductive-aged women: Its incidence correlates with the number of lifetime sex partners, and this correlation holds true even when one controls for a series of socioeconomic variables: poverty, smoking, body mass index, douching frequency, education, and oral contraceptive use... Read More

It is often assumed that black Africans, out of all human populations, most closely resemble our common ancestral state. After all, is not Africa the cradle of humanity? And did not modern humans spread ‘out of Africa’ some 50,000 or so years ago? Indeed, we are all offspring of Africa. What is less true is... Read More