The Future of an Illusion

Sigmund Freud 1927

This short essay examines religious belief through human wishes and fears. Freud debates an imagined opponent who challenges his hope that people can live without religion.

64 pages 1h 15m reading time

  • One of the most famous critiques of religion ever written, and a key text in the modern debate between faith and reason.
  • Argues that religious beliefs are "illusions," meaning ideas we hold because we badly want them to be true, not because there is evidence for them.
  • Compares religion to a childhood longing for a protective father, and suggests that humanity, like a growing child, may one day outgrow it and rely on science instead.
  • Shaped how many later thinkers explain religion through psychology, and it remains a standard reading in courses on religion, psychology, and atheism.
  • Its arguments still echo in modern popular writing that criticizes religion, often taken up by readers who reject Freud's other theories.

  • A pastor friend replied

    Freud's friend Oskar Pfister, a Swiss pastor and psychoanalyst, answered with a rebuttal titled "The Illusion of a Future."

  • Freud warned him first

    Before it came out, Freud wrote to Pfister to warn him the book would clash with his faith.

  • A letter sparked another book

    Romain Rolland wrote to Freud about a religious "oceanic feeling," which Freud explored in "Civilization and Its Discontents."

  • Published by Freud's own press

    It first appeared from the publishing house Freud's psychoanalytic movement had set up in Vienna.

Translated from German by W. D. Robson-Scott