If the study of Ryan Schacht at the Univeristy of Utah is right, the are of Chelsea, known by the "Sex and the City" fans, might become a dangeours place. In the 10001 zip code of Manhattan's chic Chelsea district, 78 per cent of 20-year-olds are females (source Premarital Sex in America: How Young Americans Meet, Mate, and Think about Marrying). That meas that the human sex ratio (men versus women) is one of the lowest in the world. Gut feeling related to "more testerone-fuelled violence" might make you assume that more men versus women would lead to more violence. But a study of Ryan Schacht at the Univeristy of Utah shows exactly the opposite. Schacht states that "when women are in short supply, men perceive them as being more valuable resource". Consequently, men must be more dutiful to win and retain a female partner, and behave. In an abundance of women, men are spoilt for choice and adopt promiscuous behaviour that brings them into conflict with other men. Males become more violently competitive when there are more women. And you get much more violence and crime in these areas, according to the study.
Source: NewScientist, 8 October 2016, p. 12
Manhattan, New York