Idea: Do NOT Forget.

I'm thinking of a setting for a story.  Take this quote from Milton Friedman: "Only a crisis... produces real change. When that crisis occurs, the actions that are taken depend on the ideas that are lying around." and add it to the the word "religion," from the Latin religio, meaning "bind together." Religion binds people, forming communities.  Then, add an apocalyptic event.  What this equals is a world where everything is wiped out and the ideas lying around will be these small doomsday cults, bound together by their cult leaders.  They will multiply.  They will go from being a small minority to a vast majority.  I'm thinking this could make a very scary place.