Also, beyond the purely personal, are there any actions that could be taken by individuals right now that would have a positive impact on humanity’s chances to recover, conditional on nuclear war?
Some (probably naive) ideas:
Downloading and printing vital information about how to rebuild food supply and other vital infrastructure (so that it can easily be accessed despite varying degrees of infrastructure collapse); I guess ALLFED’s articles might be a good starting point (even though I could not quickly find any distilled strategy document/user guide for their research)?
Increase the likelihood that you will be able to distribute this information: Ensure survival, build local networks, practice leadership skills etc.
Make sure others do the same: While there already seem to be a lot of preppers, I do not know whether their culture emphasizes strategies for rebuilding a flourishing civilization over mere survival. “Altruistic prepping” might be a relatively neglected niche (or not, these are just off the cuff thoughts...)
Putin seems to have ordered deterrence forces (which include nuclear arms) to be on high alert, roughly an hour ago. https://www.reuters.com/world/europe/biden-says-russian-attack-ukraine-unfolding-largely-predicted-2022-02-24/
Can someone weigh in about how unprecedented this is? Some media coverage has compared the severity of the current situation to the Cuba Crisis, which would be extremely alarming if remotely true.