> " Anger and fear both seem like tools for survival in a world most of us no longer live in."

i've come to settle on a mental model of fear being the driver of anger. when someone gets angry, a (perceived) threat typically underlies the anger. and anger is a way of overcoming conventional social norms to unleash energy to counter the threat.

sometimes the threat is simply to the ego of the angered person. this helps me understand my own anger, which can be confounding at times.