Both men and women commit acts of violence but I do think violent crime arrests/incarcerations show a larger # of men do.

What about the theory that in early society, powerful (and many times violent) men had numerous wives resulting in the gene population of men being a bit more violent? I faintly recall reading that Genghis Khan genes can be found in a large part of the world population and only men can pass down Y traits. Violence passed down through natural selection? Perhaps it will moderate over time since there aren't any modern day Genghis Khans?