Psychologist · 1856 – 1939
Sigmund Freud
Key Takeaways
- Freud founded psychoanalysis, a theory and therapy centred on the unconscious mind.
- He argued that dreams, slips and symptoms reveal hidden mental conflicts.
- He proposed a model of the mind divided into id, ego and superego.
- His ideas reshaped psychology, psychiatry, art and modern thought.
Sigmund Freud changed how humanity thinks about thinking. By insisting that much of mental life is hidden from us, he founded psychoanalysis and made the unconscious a permanent part of modern self-understanding.
The unconscious mind
Trained as a neurologist, Freud came to believe that buried desires and conflicts — many formed in childhood — drive our behaviour, surfacing in disguised forms through dreams, slips of the tongue and neurotic symptoms. His 1899 book The Interpretation of Dreams argued that dreams are coded expressions of unconscious wishes, and he later mapped the mind into the id, ego and superego.
A contested legacy
Freud’s specific claims, especially about sexuality, are widely doubted today, and scientific psychology has moved well beyond him. Yet his influence on the modern era is immense: drawing on the biological vision of Charles Darwin and echoing the hidden drives explored by Friedrich Nietzsche, this pioneering psychologist reshaped psychiatry, art and the everyday language we use to describe ourselves.
Influence
Whether accepted or contested, Freud put the unconscious at the centre of how the modern world understands the mind, dreams, childhood and human motivation.
Legacy
Psychoanalysis reshaped psychiatry, the arts and everyday vocabulary, even as scientific psychology moved beyond many of his claims.
Major Works
- The Interpretation of Dreams (1899)
- Civilization and Its Discontents (1930)
Controversies
- Many of his specific theories, especially about sexuality, are now considered unscientific or unfalsifiable.
Connections
Frequently Asked Questions
Who was Sigmund Freud?
Sigmund Freud (1856–1939) was an Austrian neurologist who founded psychoanalysis and developed influential theories of the unconscious mind, dreams and personality.
What is psychoanalysis?
Psychoanalysis is the theory and therapy founded by Freud, which seeks to uncover unconscious conflicts — often rooted in childhood — through methods such as free association and dream analysis.
Citations & Sources
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