Sometimes I disagree with you. On these issues there are so many intersecting points that the people who have studies the 1900-1950 world history see countless precedents for today. Beyond dispute, I hope, is the reality that autocracies (called Communists, monarchies, empires, nazi...) always are susceptible to jingoistic histories of glory, with accuracy unimportant to them. The Russian revolution to Imperial Germany WWI loss, White Russians in Shanghai, etc, then Manchukuo and all that followed those fomented the attitudes that have risen today.
Without a doubt, because he tells the story constantly, Putin wants Alaska back, wants the Baltics Russian and wants Eastern Europe all within the Russian influence zone. He wanted that publicly when he was Deputy Mayor of Saint Petersburg. Make no mistake, he will not compromise.
We also should not even begin to doubt the Chiese insistence on the Spratleys and Taiwan, among others. not too far away is a considerable part of eastern Russia.
Going back to the Vladivostok base fro Russian traders in furs etc the territory of Alaska down the North America west coast to Fort Ross in 1812, now California.
The 1867 Emperor Alexander sale of Alaska is seen as a traitorous act by Putin.
Be realistic, everyone, there are enormous delusionary visions of restoration to former glory abundant in the autocratic leaders of two huge nations. Perhaps luckiest for the world. the Chinese one is fully competitive and is not really delusional. Ambitious and aquisitive, but not delusional.
There is not now a chance of a positive outcome for the world, in my very humble opinion. The least harmful would be the traditional method of disposing with delusional autocrats.
I am not an expert. I have studied history. As
@nativewolf points out the US civil war and WWII had many common elements. Corollary: It is futile to compromise on fundamental issues.
FWIW, Thailand/Siam and Afghanistan take opposite approaches to foreign interference. Either way, the invaders fail...eventually.
Ukraine and the Baltics are new. but they've made major progress in their own choices of governance.
For reference just consider the ~20% of ethnicities within the Russian Federation, and the political subdivisions that officially exist today:
en.wikipedia.org
This excludes the many people who are fundamental to Russian functioning who are not carriers of Russian passports. Those include ethnic Russians whose families emigrated and who came to Russia drug the post-Soviet booms. They are not counted. Then consider the technical and administrative functionaries of Russia today, many of whom have no direct affinity for the current events.
These factors, taken together spell an explosive combination. We are seeing the beginning. Nobody can know what happens next.
This is a time for high liquidity and calm. No rational person knows whether the world will "luck out" or not. Just now I have noobnfidence that the US leadership will or can understand reality. We know Putin cannot, nor is there any obvious successor. Perhaps the least likely to panic might be China.