Believe me, even if no peace treaty is signed and the war continues, there will be no third world war. Superpowers like the US and EU will never let that happen because it is not in their interests either. That is why they only supply mediocre weapons in limited quantities and do not allow Ukraine to strike too deep into Russian territory. Just looking at that, it's clear that they have no intention of letting this war spread to their territory. They just want it to happen in Ukraine and keep Russia bogged down in the war as long as possible, which is the main goal of the war. And when the goal is achieved, the war will end.