Sigmund Freud

Sigmund Freud (1856–1939), founder of psychoanalysis, developed an influential naturalistic critique of religion that has shaped twentieth-century debates on the question of God. Trained in neurology in Vienna, Freud's clinical work led him to a depth-psychological account of mind centered on the unconscious, repression, and infantile sexuality. Although religion was not his primary subject, several major works addressed it directly: 'Totem and Taboo' (1913) proposed a mythical 'primal horde' origin of religion in parricidal guilt; 'The Future of an Illusion' (1927) characterized religious belief as a wish-fulfilling illusion projecting the protective father onto the cosmos; 'Civilization and Its Discontents' (1930) examined religion's role in restraining instinct; and 'Moses and Monotheism' (1939) offered a speculative reconstruction of Jewish monotheism's origins. Freud held that religious doctrines are neither true nor verifiable but psychologically explicable through projection and infantile longing. His arguments influenced subsequent naturalistic critiques and the psychology of religion, though they were vigorously contested. Critics including Oskar Pfister (a Protestant pastor and friend), Hans Küng, Paul Ricoeur, and Adolf Grünbaum challenged the empirical basis of his theory of religion, the genetic-fallacy structure of the wish-fulfillment argument, and the historical claims of 'Moses and Monotheism.' Ricoeur nevertheless treated Freud as one of the 'masters of suspicion' whose hermeneutic compels theology to purify itself of idolatrous projection.