from the world's big
A groundbreaking study from a Harvard University team suggests that monogamy may be genetically programmed within some mammals.
Evolutionary anthropology has for some time tried to understand what natural relationship pattern humans follow, if there is one. In his book Sex at Dawn psychologist Christopher Ryan posits that our prehistoric ancestors practiced multiple kinds of sexual and romantic relationships.
Which came first, monogamy or the social contract? Evolutionary psychologists and biologists think the latter.