The massive threats to human welfare are generally brought about by deliberate acts. , . . I t is the principled resort to aggression that is of greatest social concern but most ignored in psychological theorizing and research. "Differing conceptions of what constitutes aggression produce different lines of theorizing and research. Psychological theories of aggression have been largely concerned with individual physically injurious acts that are aversively motivated. In most of these accounts aggression is not only attributed to a narrow set of instigators, but the purposes it presumably serves are limited. Inflicting injury and destruction is considered to be satisfying in its own right and hence is the major aim of aggressive behavior.In actuality, aggression is a multifaceted phenomenon that has many determinants and serves diverse purposes. Therefore, theoretical formulations couched in terms of frustrating instigators and injurious aims have limited explanatory power (5). A complete theory of aggression must be sufficiently broad in scope to encompass a large set of variables governing diverse facets of aggression, whether individual or collective, personal or institutionally sanctioned.Aggression is generally defined as behavior that results in personal injury and physical destruction. Not all injurious and destructive acts are judged aggressive, however. Whether injurious behavior will be perceived as aggressive or not depends on subjective judgments of intentions and causality. The greater the attribution of personal responsibility and injurious intent to the harm-doer, the higher the likelihood that the behavior will be judged as aggressive (5, 53).