And yet, and yet.. You can find research to show that men occupy a wider spread than women in the bell curve. We also have a stunning lack of female outliers throughout history. Coming from a conventional social sciences starting point the usual response to this fact would be to blame patriarchy. I suspect it's more to do with the fact that evolutionary pressures have forced men to compete for resources, and thus selected out the less forceful, whereas women have not been subjected to anywhere near the same competition. But with that we are in the realms of unproveable, theoretical speculation, just as we are when we talk about patriarchy.