There never was a good war or a bad peace.

Even a war that had to be fought leaves a bill nobody counts properly at the time, and even an unsatisfying peace preserves things that fighting would have destroyed. The case for conflict is always easier to make in advance than to defend afterwards, because the costs land later and fall on people who never chose. Peace, meanwhile, gets criticised for what it fails to achieve rather than credited for what it quietly keeps. That asymmetry is worth remembering whenever a fight is argued for.

On a much smaller scale the same applies to your own disputes. Count what the fighting itself will cost, not only what winning would gain.