That is a profound insight, and I am in agreement. Thich Nhat Hanh, a Buddhist monk who wrote 'Anger', said that fear is the root of anger, and anger the child of fear.

Physiologically, fear and anger are not able to be told apart by researchers. The body squirts the same chemicals, we get the same look on our faces, and our pulse reacts the same way to either.

It says a lot about people who are megalomaniacal.