If there is a biological reason, I think it would be more likely that it is because men have reasons to take risks and women haven't - other than men, women can

If there is a biological reason, I think it would be more likely that it is because men have reasons to take risks and women haven't - other than men, women can almost always reproduce, no matter if they are rich or poor. See "Is there anything good about men?" http://www.psy.fsu.edu/~baumeistertice/goodaboutmen.htm http://www.psy.fsu.edu/~baumeistertice/goodaboutmen.htm