http://blog.newsweek.com/blogs/labnotes/archive/2007/07/26/the-original-roid-rage.aspxThe strongest genetic predictor for violence and aggression is . . . having a Y chromosome. Four times more males than females suffer from antisocial personality disorder, which is characterized by impulsive aggression, and a glance at any police blotterenCommunityServer 2.1 SP2 (Debug Build: 2.18)