“Civility” ought to be a dirty word.

There’s a lot to be said in its favor.  An overwhelming majority of human interactions are easier, safer, and/or more effective when both parties, explicitly or through social convention, agree to be civil.  This commitment is why not every instance of people bumping into each other on trains ends in a fistfight, and it’s the baseline that undergirds conversations between unfamiliar people in any space.

Some interactions need to end in fistfights.