How would your outlook on conflicts change if world leaders solved disputes like your favourite teacher resolves classroom disagreements?

The world political stage is not a classroom. This is an inaccurate and overly simplistic comparison. There are far more factors involved than a simple classroom debate/argument would involve. Primarily among them, everyone (or almost everyone) in that classroom grew up in the same nation, with the same language, familiar cultures, and known ideologies. This is absolutely not true on the world stage.

I think the U.S and other countries would be able to resolve conflict in a peaceful manner if they dealt with disagreement the way my teacher would

I think that everything would be more calm for a while and nothing new would come up Yk. Like they’re wouldn’t be the same conflict over and over.