Relying on them, no. But in practice natural disasters are rarely a "collapse of society" sort of thing. It's more that you should have supplies and shelter,

Relying on them, no. But in practice natural disasters are rarely a "collapse of society" sort of thing. It's more that you should have supplies and shelter, and a way to communicate. In the middle of difficulties where people work together, I'd say that's "society" in action. "Collapse of society" tends to be more descriptive of human-driven disasters such as war and civil war, where people start turning against each other and there's high levels of mutual distrust and violence.