It's a combination of factors, different for every case. Mental health, and access to facilities which help with that are one factor. A guy ended up being driven to snipe people from a rooftop because he had a large tumor in his brain. Suicide rates are also higher amoung men, signifying that men's needs are not being met. Societal pressures might also drive more men than women to cause physical harm. Consider bullies at school. Boys are physical, while girls are emotional in their harm (typically). When deciding that they must take an action that will probably end in their death, men will seek to cause physical harm to others, while women will seek to cause emotional harm to others. [i] [/i] [i] [/i] [i][/i] [spoiler]Things that don't cause such events: Comic books, video games, and television. Suck it, media and Concernocrats! [/spoiler]