I recently saw a comment chain about nuclear bombs, and that led me to thinking about this. Say there is a nuclear explosion in the downtown of my US city. I survive relatively fine, but obviously the main part of the city has been destroyed, while major zones extending from the center were also badly damaged. What would be a good response to (a) survive and (b) help out the recovery effort?
The thing is, people inherently want to live. It’s instinctual. Secondly, everybody - regardless of skill level - can learn to be handy and useful. If everything is destroyed, and society is to be rebuilt, a lot of manual labor will be needed for cleanup and rebuilding. Even the “I pick things up and put them down” guy is perfectly suited for this type of work.