Peace begins when proving your point becomes less important than preserving yourself.

The drive to establish that you were right is expensive, and it usually costs exactly the calm you were trying to defend. At some point the choice becomes explicit: you can have the point or you can have yourself back, and rarely both in the same week.

Ask what would actually change if the other person agreed with you. Often nothing. Once that is clear, letting the point go stops feeling like surrender and starts feeling like retrieval.