Diplomatic and political institutions are currently designed for communication between polities, their fundamental mission isn't to promote peace unless that is in their national interest (which is most of the time- but not always). The UN now has departments with this task, but my point is they are barely funded. I'm not expecting any silver bullet, I just think having minimal people working on this problem is foolish.

I didn't say anything about stopping the Ukraine War, so I'm not sure how that relates.