Some of the comments on the link by James_Miller exactly six months ago provided very specific estimates of how the events might turn out:
James_Miller:
- The odds of Russian intervening militarily = 40%.
- The odds of the Russians losing the conventional battle (perhaps because of NATO intervention) conditional on them entering = 30%.
- The odds of the Russians resorting to nuclear weapons conditional on them losing the conventional battle = 20%.
Me:
"Russians intervening militarily" could be anything from posturing to weapon shipments to a surgical strike to a Czechoslovakia-style tank-roll or Afghanistan invasion. My guess that the odds of the latter is below 5%.
A bet between James_Miller and solipsist:
I will bet you $20 U.S. (mine) vs $100 (yours) that Russian tanks will be involved in combat in the Ukraine within 60 days. So in 60 days I will pay you $20 if I lose the bet, but you pay me $100 if I win.
While it is hard to do any meaningful calibration based on a single event, there must be lessons to learn from it. Given that Russian armored columns are said to capture key Ukrainian towns today, the first part of James_Miller's prediction has come true, even if it took 3 times longer than he estimated.
Note that even the most pessimistic person in that conversation (James) was probably too optimistic. My estimate of 5% appears way too low in retrospect, and I would probably bump it to 50% for a similar event in the future.
Now, given that the first prediction came true, how would one reevaluate the odds of the two further escalations he listed? I still feel that there is no way there will be a "conventional battle" between Russia and NATO, but having just been proven wrong makes me doubt my assumptions. If anything, maybe I should give more weight to what James_Miller (or at least Dan Carlin) has to say on the issue. And if I had any skin in the game, I would probably be even more cautious.
If Russia takes a NATO country and the US doesn't intervene then US troops obviously don't act as tripwires. This implies that the US is an unreliable ally, which would prompt the other NATO members to say a big "fuck you" to the US and take defense on their own hands, which would include turning Europe into the Fourth Reich, rebuilding the Japanese Empire, some countries preemptively siding with Russia, and so on.
Consider two reasons the U.S. has for protecting a country from Russia or China. (1) Because of some document signed a long time ago. (2) Because we would lose a lot if that country fell under the control of Russia or China.
(2) has always been a lot more important than (1). The dead hand of the past is a lot weaker than it seems in international relations.
Having the Germans and Japanese spend more money on their military would benefit the United States. If I were Putin I would consider the main downside of taking Estonia being that German would respond by militarizing.