Aggression, as a psychologically hostile and violent behavior, is an act intended to cause physical, mental or social harm, particularly between members of the same species. While we often think of aggressive behavior as physical violence, psychologists also consider instances of a more subtle nature. For example, using rumor to damage another’s reputation and public ridicule are both forms of social aggression. In this book, the authors present current research in the study of aggressive behavior. Topics include evolutionary perspectives on aggression; impulsive-aggressive behavior in adolescents; new methods for predicting dominant individuals in mammalian social structure (Sazepuri method); dealing with aggressive patients in healthcare; children’s aggressive behavior in cultural context; and prenatal smoking, anger regulation and impulsive aggressive behaviors.