Every false philosophy is an imagination of a world propitious to irrational demands and unregulated desires. The false philosopher's dream infects someone in closer touch than himself with everyday experience, this agent of his desire seeks to translate the dream into reality, and disaster follows. It is the Cinderella story in actual life. Rousseau was Robespierre's fairy godmother, Karl Marx was Lenin's, Nietzsche was Hitler's.

"Oscar Wilde's Fairy Godmother", The Best of Hugh Kingsmill (1973) p. 278 (1948)