The horror of the society that flips fascist from within—without the aid of a foreign invasion—lies precisely in this unsettling feeling of familiarity. When that ferocious force is conjured up to wage war on a portion of the domestic population, there are no outsiders to blame. It’s the nice, normal people down the street who turn out to be capable of monstrosity—monstrousness is revealed as the evil twin of nice, the doppelganger of normal.

FICTION: This invites a story where the horror comes not from villains but from recognizable, decent-seeming neighbors turning monstrous — a domestic doppelgänger dynamic.

Naomi Klein, Doppelganger, loc. 436