Anger's chain reaction

In my opinion, anger is one of the most powerful emotions, because it is hard to control. Emotions always drive people to do some crazy things, especially anger. For example, a man thought his wife cheated on him, and he was so angry. Then, he beat his wife badly. His wife got paralysis, and he also went to the jail. Wife's parents only had this only daughter, and they were so angry. They hired a killer to kill the husband. In result, a family fell apart. One died; one paralyzed; two went to the jail. When the father was interviewed, he said he regretted to do this, however, regret could not change anything. This is a chain reaction, anger allowed the husband to beat his wife, and then the wife's parents killed the husband. They gained nothing from this serie of crimes, except regrets, illness and death.