So why do some people choose to deal with the world in an aggressive, hostile fashion?
Hostile, angry people often win confrontations because they attach great importance to matters that most people don’t care enough about to turn into major conflicts. They may also imagine that their anger achieved a goal that they would just as easily have been won by a polite request.
However, they set a trap for themselves by their behavior. Their perpetual anger gets them constantly into conflict situations, which reinforce their perception of the world as a hostile, negative place. Anger thus becomes a self-fulfilling prophecy, creating the hostility and rejection it anticipates.
Most of us enjoy the luxury of not having to confront life-or-death circumstances on a regular basis. So what remains to make us angry? Substitute “ego-threatening” for “life-threatening,” and an entire new world of anger-inducing opportunities emerges.
We perceive threats in anything that:
Belittles our thoughts, beliefs, feelings and needs
Threatens the success of an endeavor to which we are strongly committed—financial achievement, reputation, significant personal relationship, etc.
Confirms our paranoid belief that our failures are caused by others
Demands a change that we view as a loss 
What all these goads to anger have in common is that they challenge the perception we have of ourselves and our place in the human pecking order. The source of the anger-inducing frustration is the assumption that attainment of our goals requires that others change their behavior or perceptions.
At the root of this assumption lies a failure to see other people as free agents. Instead, the angry person sees them as objects—as means or impediments to his or her goals. Any behavior that thwarts his desires thus becomes a deliberate act of sabotage or an incompetent frustration of his progress. Even the most short-tempered person never gets angry at the people behind him in a traffic jam, even though their relationship to the situation is identical to that of the people in front of him. The angry person’s moral imperative is that people ought to get out of his #&!@%+ way!
Most of us see our goals as something we want, recognizing that those desires take no precedence over those of our neighbors. The angry person sees them as needs, uniquely worthy of recognition and fulfillment. 
It would be easy to dismiss this worldview (and its possessor) as arrogant or infantile. But, more charitably, it can be viewed as a learned response to life, possibly born of early trauma and subject to modification.
 Adapted from Dombeck, M, An Apology for Anger Management, 2003.
 Adapted from Angry Feelings and Aggressive Behavior
 Froggatt, W., The rational Management of Anger: An outline for therapeutic intervention,New Zealand Centre for Rational Emotive Behaviour Therapy, 1997. Accessed 11/15/2004