[jpsb]

Ukraine is unlikely to relent in that US and NATO support continues and a full victory is increasingly possible, with Russia ejected from all occupied territories, including Crimea.

Russia will go nuclear should the above become likely.

[Rockingham]

A use of nuclear weapons would end Russia as an organized society. My guess is that the US and the EU have laid out a peace proposal to Putin's foreign minister, Lavrov, that, among other things, lets Putin and his cronies go into secure foreign exile with a choice of hospitable venues and a slice of their wealth available. With the Russian security services edging away from Putin, his control of the Russian nuclear arsenal is likely now subject to their veto.

[ansel12]

Russia wants to end itself forever in nuclear fire rather than leave Ukraine alone?

Are you sure of that?