>>if there is to be any hope of Russia remaining a viable country
Look at the demographics. They're already toast. Of course, the countries in a (geographic) position to sweep through are nearly as bad off.
I guess Stalin was anti-war. Stuffing people into multi-family apartments meant no to babies, and that kept compounding - so not many fighting-age men (AKA no to war - which I keep seeing on Russian protest signs).
I've wondered if the Ukranian invasion happened now because in five or ten years they'd be unable.