Abstract
Evolutionary psychology offers a fairly ‘patriarchal’ picture of sex differences, according to which men are, ‘by nature’, much more polygamously disposed, much more desirous of power over the opposite sex, and much more aggressive than women. However, the picture – at least in its components and – becomes problematic if one looks at the history of conceptions of paternity accepted by our ancestors. It is argued in the paper that the very fact that our ancestors accepted various and essentially different conceptions of paternity casts a shadow of doubt on the ‘patriarchal’ picture of sex differences.