ABSTRACT
The word aggression is recognized and under stood in common usage (Duncan 8c Hubson, 1977), although there is much disagreement about its precise meaning and causes. Even among scientists the term is used so broadly that it becomes virtually impossible to formulate a single and comprehensive definition. Far from being a univocal term, aggression shows a large amount of ambiguity. Stemming from the Latin verb aggredior (to approach, to attack a task), it is an omnibus label with a surplus of mean ings, ranking from an internal state or person ality trait to an overt response.
