Well, actually, we do. Aptitude testing shows[1] that while females tend to cluster more towards the average, male populations produce more outliers. There are

Well, actually, we do. Aptitude testing shows[1] that while females tend to cluster more towards the average, male populations produce more outliers. There are both more male geniuses and male imbeciles than their female counterparts. [1] for example http://www.aei.org/publication/chart-of-the-day-scottish-iq-test-scores-by-gender-reveal-the-greater-variability-of-male-intelligence/ http://www.aei.org/publication/chart-of-the-day-scottish-iq-... This is the product of the different evolutionary strategy for males and females, the males being high risk/high reward, the females being conservative/average. I don't have a citation for that.