Why are men more aggressive than women? To find out, psychologist and criminologist Anne Campbell listened to the voices of ordinary men and women, as well as people for whom aggression is a central fact of life--robbers and gang members. The answer, she argues, lies not only in biology or in child rearing but in how men and women form opinions about their own aggression. Women believe their aggression results from a loss of self-control, while men see their behavior as a means of gaining control over others. Daughters are deeply ashamed when they get angry, but sons learn to associate...