This is a very interesting and sobering document from the US think tank the Rand Corporation - an august body funded by the US arms industry and the Pentagon so you can assume that such a piece of work carries a lot of weight in informing and helping to shape US foreign policy. It has been released with virtually no press interest so one could assume it is intended to leak slowly into the debate of how this war could end.
My take is that we will start to see a pivot in the narrative shortly as Biden calculates what is the off ramp and can he deliver a peace that brings the oil price down and a resurgent economy before the next election and that the war in uniting NATO , spurring rearmament and degrading and exposing Russian weakness has been a big win for US foreign policy. Just a shame that Zelenskiy and Ukraine has to suffer so terribly as a consequence.
In short they assert that US interests are not the same as Ukrainian interests and US policy must put the US economic and military first.
They say that maximalism in Ukraine demands to return all their territory from the Russians are unrealistic.
The primary focus should be on China not Russia and the Ukraine war is a distraction.
Peace should be brokered and maintained by potentially withholding further US military and economic aid if Ukraine doesn't agree.
A partial removal of sanctions from Russia should be considered as part of the peace deal.
That no side can win and that there is a high risk of escalation that risks the situation spiraling out of control.
That rebuilding Ukraine would take enormous investment from western partners and that will only be forthcoming if some sort of DMZ / international partnership brokers a lasting peace which benefits both Russia and Ukraine.
https://www.rand.org/pubs/perspectives/PEA2510-1.html