Don't be so sure, you can't possibly close the door to future aggression unless of course we think the Ukraine is going to invade and conquer Russia not that even that guarantees no future aggression. If the Russians were to table that offer the pressure on Zelensky from the west would be absolutely massive and ultimately it will be the support of the West that decides when Zelensky has to draw a line.No he wont. That would open the door to future aggression from the USSR.