People usually think that anger is the emotion over which they have very little control or none at all. People who are angry rather often may say that anger is part of their character and they can not do anything about it. Some people will say that anger can also be positive emotion if one uses it for good purpose. It might be true. But here we speak about more usual type of anger that brings destruction and trouble.
Roman philosopher Seneca had a serious reason to research this emotion. (You will find out his reason when you watch the video below.) He came up with the explanation about the origins of human anger. Luckily for us, he also gave valuable insights about how to avoid getting angry or at least lessen the chances to get angry or disappointed.