Maui Jim

Some people can get addicted to the adrenalin rush more then anything else and time and improvement in your skills will make you think a bit like a paramedic who sees how easy people hurt them self and take care and look ahead.
Mind***
What your use to in a model to inspired your character development, anger can be a powerful trait picked up similar to a sponge from infancy and calmness may not be as familiar as anger was and seemed quite normal.
Body***
Body temperature can add to anger, hot foods and such, try cooler foods, melons, strawberries, cooler meats like pork, lamb
Chemical***
Low serotonin levels, causing anger , depression...abandonment. (get checked if you have insurance)
We Americans also can miss out on the eastern way of thinking calmness and humility and dropping the ego history .
Getting your ass kicked with or without lifetime scars will speed up the process too.
When the day comes you doubt your ability because of age and your not felling indestructible any more can bring on a need for wanting calmness and a sweet-stomach over the adrenals getting worked over, speeding up your last breath .
You'll just find no use for it, (anger) or you'll grow old and nasty caring anger and a weapon to make the odds more even and sit in a cell at 60.
When your long term health is considered you let go more easily, but you have to pick the more meaningful wars (protecting, saving your own ass or someone's else's if it comes up) and skip the rest.
Anger will eat you up, 95% of our bodies problems comes from the digestion system, so anger has little place in making it sweet (no excessive acids)
Think of the folds of the brain similar to the folds of the colon, the brain is the parent and the stomach is the child, common sense over emotional reaction equals long life
Unfortunately we don't always want to see it early on.
My experience
Maui Jim