The History of Hypnosis: From Mesmer to Modern Therapy

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In the salons of 1780s Paris, well-dressed patients gathered around a tub of “magnetized” water, holding iron rods, waiting to be cured by an invisible force. Presiding over them, in a lilac robe, was an Austrian physician convinced he had discovered a healing energy that flowed between all living things. He was wrong about the energy. But the strange states his patients fell into were real, and untangling them took the next two centuries.

That is the story of hypnosis: a long climb from showmanship and bad theory toward something a brain scanner can now measure.

Mesmer and the magnetic fluid

The tale usually begins with Franz Mesmer, a physician born in 1734. In the 1770s he proposed that an invisible fluid he called animal magnetism flowed through the body, and that illness came from its blockage. By passing magnets, and later just his hands, over patients, he claimed to restore the flow.

Patients did respond, sometimes dramatically, with trances and convulsions. Mesmer became a sensation. But in 1784 a French royal commission, which included Benjamin Franklin, investigated and concluded there was no magnetic fluid at all. The effects, they decided, came from imagination and expectation. Mesmer was discredited, and his name survives mostly in the word “mesmerized.”

Yet the commission had stumbled onto something important without realizing it. If imagination alone could produce those states, then the mind was more powerful than anyone had assumed.

Braid gives it a name

The next leap came from a Scottish surgeon, James Braid, in the 1840s.

Watching a demonstration, Braid noticed that subjects entered a trance by staring fixedly at a bright object. He rejected the idea of any magnetic fluid and argued the state was physiological, produced by concentrated attention and fixation. In 1843 he coined the terms “hypnotism” and “hypnosis,” borrowing from Hypnos, the Greek god of sleep.

Braid later regretted the sleep comparison, recognizing that hypnosis was not really sleep at all, but the name had already stuck. For shifting the explanation from mysterious energy to attention and the mind, he is often called the father of modern hypnotism.

The great debate: hysteria or suggestion

By the late nineteenth century, hypnosis had moved into serious medicine, and two French camps clashed over what it was.

In Paris, the famous neurologist Jean-Martin Charcot treated hypnosis as a physical sign of hysteria, a state only certain disordered patients could enter. Against him stood the Nancy School, which argued the opposite: that hypnosis was a normal phenomenon rooted in suggestion, available to ordinary people.

The Nancy School essentially won the long argument. Hypnosis is now understood as a normal capacity tied to attention and suggestion, not a symptom of illness. But the clash shaped how the next generation thought about the mind.

Freud uses it, then walks away

One physician who passed through Charcot’s clinic was a young Sigmund Freud. Early in his career, Freud used hypnosis to help patients recall and release buried memories.

He eventually abandoned it, finding it unreliable for his purposes and preferring his new method of free association, which became psychoanalysis. Freud’s turn away from hypnosis pushed it to the margins of mainstream psychology for decades, even as it kept developing quietly elsewhere.

Erickson and the modern turn

The twentieth century’s most influential figure was the American psychiatrist Milton Erickson.

Erickson rejected the rigid, authoritarian style of the past, the commanding voice and standard script. Instead he tailored his approach to each individual, using indirect suggestion, conversation, metaphor, and story. His flexible, person-centered methods reshaped clinical hypnosis and influenced wider psychotherapy. Much of what a modern hypnotherapist does carries his fingerprints.

Hypnosis today

The modern era is defined by evidence. Standardized scales let researchers measure responsiveness. Controlled trials test hypnosis for conditions like irritable bowel syndrome and pain. Brain imaging has even begun to show what changes in the hypnotized brain.

The result is a cautious, qualified acceptance. Major health bodies now treat hypnotherapy as a legitimate complementary tool for certain uses, while researchers keep probing its limits. The robed showman with his tub of water would barely recognize the field, and that distance is exactly the point.

What the long arc teaches

Step back from the names and dates, and a single pattern runs through the whole story.

Every generation inherited a version of hypnosis wrapped in the assumptions of its time, and every generation stripped some of those assumptions away. Mesmer’s magnetic fluid became Braid’s focused attention. Charcot’s sign of illness became the Nancy School’s normal human capacity. Freud’s tool for digging up buried memory gave way to Erickson’s flexible, individualized craft. At each step the mysticism thinned and the psychology sharpened.

That trajectory is worth keeping in mind whenever you read a bold modern claim about hypnosis. The field has a long habit of overreaching and then correcting, a dramatic theory followed by a sober second look. The healthiest way to read any new promise is the way the best researchers now read the whole history: with genuine interest in the real effect, and steady skepticism toward whatever grand explanation happens to be fashionable.

It also explains why hypnosis still carries a faint whiff of the carnival even now. A practice that spent its first century tangled up with magnetic tubs, stage acts, and theatrical clinics does not shed that reputation quickly, even after the science catches up. None of which diminishes the pioneers. Mesmer, for all his bad theory, noticed that expectation could heal; Braid found the mechanism; Charcot brought it into the hospital. Each was wrong about something and right about something else, and the modern field is the accumulated residue of those corrections.

Common questions

Did Mesmer invent hypnosis? Not really. He produced hypnotic-like states but explained them with a theory that was later disproven. The modern understanding starts more with Braid.

Why is it named after sleep if it is not sleep? Braid coined the term thinking of sleep, then realized the comparison was misleading. The name outlived his second thoughts.

Has hypnosis always been controversial? Yes. From Mesmer’s discrediting to the Charcot debates, skepticism has shadowed it throughout, which is part of why the modern emphasis on evidence matters so much.

Who is considered the father of modern hypnotism? That title usually goes to James Braid, the Scottish surgeon who renamed the phenomenon in 1843 and traced it to focused attention rather than any magnetic force.

The bottom line

Hypnosis evolved from Mesmer’s mistaken magnetic fluid, through Braid’s insight that attention was the real engine, past the Charcot-Nancy debate over whether it signaled illness or normal suggestion, through Freud’s brief use and Erickson’s flexible modern style, into today’s evidence-based practice. The thread running through it all is a slow correction: every generation stripped away a little more mysticism and found a real psychological process underneath.

Sources

This article is for general information only and is not medical, psychological, or health advice. Hypnotherapy is a complementary approach, not a substitute for professional diagnosis or treatment. Talk to a licensed healthcare provider about your situation.

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