I agree people are way more agentic than we give them credit for in these situations. We tend to 'petri-dish' ourselves and act like we're just the products of our environments, being swept along when top-down analysing large situations like this when that really isn't the case.

That being said, I can't see any world where there isn't mass ontological shock/hysteria, mass unemployment, and unrest at least for a few years, and I feel like it is definitely the kind of event you take active measures and preparations for beforehand.

And so do I, but like the golden rule of camping you should prepare for the worst and hope for the best!