The basis of any agreement is trust. Signing on to any sort of "peace" agreement with Russia / Putin would be pointless. They have proven too many time that they cannot be trusted. Even if they were to leave Ukraine the world, and Europe in particular, should still never trust that they would not do some similar sort of sick attack. The reality is that no one want to join their "club" voluntarily so they try to force them by conquest. There is no place for that kind of medieval behavior in the 21st century. Russia as we know it, and as Russians know it, needs to die.