On February 24, 2002, the cover article for the New York Times Magazine "Girls Just Want to be Mean" finally drew attention to the aggressive tendencies of girls, a long neglected subject. While much attention has been paid in recent years (particularly in the wake of school shootings) to the ways in which boys vent frustration, anger, low self-esteem and a sense of isolation, until now many people have not realized that, while the damage may seem subtler, girls can do as much psychological injury to their peers as boys who harm in more physical ways. Now it's...