Mass hysteria (n.) overpowers the ego with unconscious contents and identifies it with a preconscious wholeness, and it has a prodigious power of contagion — as recently seen in Germany; whoever feels it coming should hang up a picture of St Christopher and meditate on it.
Mass hysteria (n.) is what uprooted people fall into: lose contact with the meaning of your culture and you become suggestible enough for Utopia.
Mass hysteria (n.) is what rootless masses are prepared for, and it calls for collective therapy: the abolition of liberty and terrorization.
A Mass hysteria (n.) is deadlier than plague: no medieval pestilence killed as many as certain differences of opinion in 1914.
Mass hysteria (n.) follows when denied autonomous systems are felt as a wicked will outside us, found always with the neighbour across the river, leading to collective delusions, incidents, revolutions and war.
The Mass hysteria (n.) is the collective unconscious at its most dangerous — witch hunts, twentieth-century utopias — reshaping how people see the world and spreading like a contagion, hence certain psychopaths' power over society.