People are by nature beasts. When we are hungry, we eat. When we are tired, we sleep. We see something we want and we take it regardless of who may have been in possession of it at the time. Something makes us mad and we lash out. When you allow your emotions to run rampant you will find it easy for your anger to be out of control. When your anger is out of control you run the risk of being in constant disputes, arguments, and in extreme cases even fights.
It is just that kind of unchecked, unbridled emotion that encouraged early man to organize into societies with rules and structure. However, unless we are willing to live in a feudal/ police state where the state exercises extreme control over everything we do, we have to figure out a way to get along. Laws are already in place to help society manage its impulses; speed and you get a ticket; steal and you go to jail and so on.
However, for society to do more than barely function people need to be able to exercise some control of their own, and not just what is forced on them by the legal system. That is where having anger management skills come in hand.
Many crimes are committed every year that get labeled crimes of passion. People get mad at someone for whatever reason and assault them, either hurting them or even killing them. In many cases, when the offending party calms down after the fact they realize what a terrible mistake they just made. The legal system takes their lack of self control under consideration; that can mean the difference in going to jail for a few years, for life, or even worse- the death penalty.
If a person can learn proper anger management tools they can live a much happier life. There is no need to live a life in turmoil and anger. Many disputes, arguments, and almost all fights can be avoided with the use of some very simple anger management tools.