Because aggression is so difficult to define, social psychologists, judges, and politicians (as well as many other people, including lawyers), have spent a great deal of time trying to determine what should and should not be considered aggression. But other harmful acts, such as the injuries that sports players receive during a rough game or the killing of enemy soldiers in a war might not be viewed by everyone as aggression.
We say that people are aggressive if they yell at or hit each other, if they cut off other cars in traffic, or even when they smash their fists on the table in frustration.
