The pervasiveness of heterosociality in contemporary life can lead to the obscuring of its social construction as a late development in Western history. Writing of early society, Freud considered that there was "an unmistakable tendency to keep the sexes apart. Women live with women, men with men". Durkheim associated sexual totemism, binding men and women into two separate totemic corporations, with such a social division of the sexes. Even in the twentieth century, rules of etiquette in some traditional villages dictated that men and women do not greet each other when passing in public.