This is why in the immediate wake of great disasters—a flood, a blackout, a revolution or economic collapse—people tend to behave the same way, reverting to a kind of rough-and-ready communism. Hierarchies, markets and the like become luxuries that no one can really afford them. Anyone who has lived through such a moment can speak to the way strangers become sisters and brothers, and human society itself seems to be reborn. We are not just talking about cooperation.

Communism is the foundation of all human sociability. It makes society possible. On the Moral Grounds of Economic Relations