“Patriarchy has been the normal in almost all agricultural and industrial societies. ...If patriarchy in Afro-Asia resulted from some chance occurrence, why were the Aztecs and Incas patriarchal? It is far more likely that even though the precise definition of man and woman varies between cultures, there is some universal biological reason why almost all cultures valued manhood over womanhood. We do not know what this reason is; there are plenty of theories, none of the convincing.”