Ironically this only further proves the point: US expansionist foreign policy would not have been checked by giving the US what it wanted. There was no version of Iraq complying with the UN which was going to prevent the neo-conservatives from getting their regime change invasion in 2003.

The only preventative measures which would've worked would be diplomatic and economic counter-pressure from the UN and more specifically Europe and other NATO allies, or substantial military build up capable of seriously endangering US conventional forces.

Ukraine would be in a much different military position today if it were a pariah state, as opposed to a nation declaring a strong intent to join both the EU and NATO. Turns out diplomacy, allies and soft-power are actually kind of useful things when you're not the dominant military hegemon.