A disaster occurs.
Some self-identified "preppers" imagine everyone will immediately start fighting one another.
Meanwhile, in reality, I read about everyone doing things from evacuating to search & rescue with boats and helicopters; distributing supplies by foot and bicycle and mule; and surveying and communicating by satellite and drone and ham radio.
And I am reminded of Rebecca Solnit's 2009 "A Paradise Built in Hell: The Extraordinary Communities That Arise in Disaster".