Why Do We Shout In Anger?

 Anger is also  a sign of weakness! Whatever we have to say can be said softly too. Many people think to be angry, shout , yell etc shows their power but it is sad that they have no clue it is a sign of their weakness rather than their strength or power!!!

 Amen

 I don't agree that anger is a weakness.  What about righteous anger?  Seeing someone hurt a small child or an innocent human being.  Whispering to the one who's doing the harm won't work at all.

You are correct in saying yelling is a sign of weakness, if that yelling is abusive. But as Annette wrote, strong and loud intervention is sometimes most appropriate.  

 Annette -- Righteous anger is what we call anger that we wish to justify.  Whispering to the one who is doing harm probably won't accomplish much.  It probably also won't escalate the hurting behavior as anger is likely to do.  There are a lot of options other than anger and whispering, like stating objection and disagreement firmly and directly and strongly without anger.  I'm not saying I'm good at that, but I've gotten better, and I do very much believe in it.  Anger isn't necessary.  Gandhi, of course, was the great model of this.