Reactions, reactions. I could talk about this all day long.
Why do nations go to war? Both sides react to each other.
Why does that abusive mother shout at her kids? Her kids say something and she reacts to them with anger.
Why do you become scared of doing that telephonic interview? You have a negative thought about stammering and you react to it by creating fear.
If every person in the world learnt to stop reacting so much by just 1% a year, I wonder what the sum total would do for increasing the peace in the world. Unfortunately, wishing for every person to do this is impossible.
However, we can start with ourselves. This much we can do.