Mesmerism

Summary

Mesmerism — also called animal magnetism — was a healing system founded in the 1770s by the Viennese physician Franz Anton Mesmer, who claimed that an invisible magnetic fluid permeated the cosmos and, when blocked in the human body, caused disease. Mesmer believed he could redirect this fluid through touch, gaze, and elaborate group ceremonies, inducing healing convulsions he called “crises.” In 1784, a French royal commission including Benjamin Franklin and Antoine Lavoisier investigated the system and concluded that no such fluid existed and that Mesmer’s cures were products of imagination. The physical theory was demolished, but the phenomena it produced — altered consciousness, susceptibility to suggestion, apparent healing — refused to go away. Over the following century mesmerism gave birth to hypnotism, nourished the mind-cure movement, seeded spiritualism, and flowed underground into psychoanalysis. It stands as one of the most consequential failed theories in medical history. Haller’s retrospective thesis places mesmerism, alongside Swedenborgianism, as one of two foundational metaphysical currents that ran through the nineteenth century into virtually every major strand of American alternative medicine — homeopathy, Christian Science, New Thought, osteopathy, chiropractic, and New Age healing.(Haller, 2010) Unlike the botanical reformer Samuel Thomson, who positioned himself in explicit opposition to established medicine, Mesmer and Hahnemann initially understood their work as reforming medicine from within — as improving on orthodox practice rather than replacing it.(Jackson (ed.), 2011)

Origins: Vienna and the Universal Fluid

Franz Anton Mesmer (1734–1815) trained in medicine at Vienna, but the conceptual foundations of his system lay deeper in the European tradition than any medical school could provide. He was assembling existing materials as much as inventing new ones. His theory drew from Paracelsus’s magnetic philosophy, Athanasius Kircher’s theology of magnetism, the Jesuit astronomer Maximilian Hell’s experiments with healing steel plates, and — most provocatively — the exorcistic demonstrations of the Austrian priest Johann Joseph Gassner, who had recently drawn thousands of followers in southern Germany before being silenced by secular and papal authorities in 1775.(Haller, 2010)(Andrew Scull, 2015) Mesmer watched Gassner work and recognized something in those convulsions and cures. What he wanted was the same phenomenon, stripped of its theological scaffolding and reclothed in the language of Enlightenment natural philosophy.

The resulting system was both tidy and extravagant. Mesmer postulated an invisible universal fluid — magnétisme animal — that permeated the natural world and required even distribution throughout the body for health to be maintained.(Haller, 2010) When this energy was disrupted, the affected organs became dysfunctional and illness followed. The physician’s task was to restore equilibrium, which Mesmer claimed to accomplish by passing magnets, and later simply his hands, over and around the patient’s body.(Haller, 2010) Disease, he declared, could not be cured without a “crisis” — a convulsive discharge that he understood as nature’s effort to dissolve obstructions and reestablish harmony.(Whorton, 2002)

After years of controversial practice in Vienna, Mesmer moved to Paris in 1778 and transformed his clinical work into a spectacle. By 1781 he had established himself there offering specialized therapy to redirect the flow of animal magnetism through the body, a practice that became fashionable but lacked widespread institutional support from the medical establishment.(Jackson (ed.), 2011) His group sessions gathered wealthy and fashionable patients — predominantly women — in a heavily curtained room around a large covered wooden tub, the baquet, filled with magnetized iron filings and water. Mesmer arrived in a lavender silk robe to soft, mournful music, moved among his patients fixing each with his eyes, and touched them with a long magnetized iron wand.(Ilza Veith, 1965) Patients fell into what looked like seizures, wept, laughed, or collapsed — and many reported being healed.(Andrew Scull, 2015) His reputation spread across Europe, his practice overflowed, and he attracted both adoring disciples and furious enemies within the medical establishment.

The Franklin Commission (1784): Debunking the Physical Theory

The success — and the disruption — was impossible to ignore. Mesmer’s jealous competitors in the Paris medical world pressed hard enough that King Louis XVI appointed a formal commission of inquiry in 1784.(Andrew Scull, 2015) The membership was extraordinary: the astronomer Jean-Sylvain Bailly, the chemist Antoine Lavoisier, Joseph Guillotin, and Benjamin Franklin, then serving as American ambassador to France and the world’s leading authority on electricity.(Ilza Veith, 1965) A second commission was simultaneously convened by the Royal Society of Medicine.(Haller, 2010)

The commissions worked methodically. They could not deny that something was happening to Mesmer’s patients. What they set out to determine was whether any physical fluid was responsible. Their experiments involved blindfolded subjects who were told they were being magnetized when they were not, and unmagnetized subjects who were told they were being treated. The results were clear: subjects responded to what they believed, not to any external force.(Whorton, 2002) The commission reports concluded that Mesmer’s magnetic fluid did not exist and that the therapeutic effects — when genuine — were produced by “suggestion from the magnetizer and the imagination of the patients.”(Whorton, 2002) Both the main commission and the Royal Society of Medicine also warned of the potential for serious social mischief from the spread of the practice and recommended its suppression.(Haller, 2010)

This was the first major instance in European history of a systematic controlled investigation overturning a popular medical claim. But the debunking had a paradoxical quality. The commission had attributed Mesmer’s cures to imagination — and imagination, as the Oxford Handbook’s chapter on medicine and mind would later observe, was a real mental force.(Jackson (ed.), 2011) By attributing therapeutic effects to the patient’s mind rather than to a physical fluid, the commissioners had not destroyed mesmerism so much as relocated it: from physics to psychology. Mesmerism became psychological, as one historian put it, at the very moment it ceased to be scientific.(Jackson (ed.), 2011)(Jackson (ed.), 2011)

Mesmer himself never accepted this interpretation. He left Paris, spent years attempting to rehabilitate his reputation, and died in 1815 still insisting on the physical reality of his fluid. The movement he had created, however, moved on without him.

Somnambulism and the Shift Toward Mind

The most important early development after the commission came not from Mesmer but from one of his disciples, the Marquis de Puységur, who reported something unexpected in 1784 while magnetizing a young shepherd named Victor. Instead of the violent crisis Mesmer expected, Victor entered a calm, sleep-like trance — what Puységur called “somnambulistic sleep” — and underwent a remarkable transformation.(Ilza Veith, 1965) The usually taciturn and ignorant young man became, in the magnetized state, an animated and eloquent conversationalist. He was also capable of apparent clairvoyance, able to diagnose the illnesses of other patients and prescribe remedies.(Ilza Veith, 1965)

Puységur drew the obvious conclusion: the causative factor was not Mesmer’s physical fluid but his own power of thought or suggestion over the patient.(Haller, 2010) This was not a minor revision. It reoriented the entire enterprise from manipulating an invisible substance to manipulating a psychological state. The healing crisis — convulsions, weeping, discharge — gave way to investigation of the trance itself, with its access to what appeared to be hidden regions of the mind. Within a generation, mesmeric practitioners were less concerned with physiology than with questions about consciousness, identity, and the range of human mental powers.

Spread: Magnetic Healing Across Europe and America

The commission’s condemnation did little to halt the movement’s popular spread. Mesmerism arrived in the United States in the 1830s carried by traveling demonstrators, and it took particularly deep root there.(Whorton, 2002) American audiences were simultaneously fascinated by the altered-state phenomena — clairvoyance, apparent telepathy, somnambulistic diagnosis — and by the democratic promise that healing power was accessible outside the medical establishment.

At the Eclectic Medical Institute in Cincinnati in the 1850s, the curriculum explicitly included lectures on mesmerism alongside standard medical subjects, taught under dean Joseph Rodes Buchanan.(Haller, 1999) Mesmerism was evidently compatible with — indeed welcoming to — the eclectic reform tradition that rejected orthodox heroic medicine in favor of gentler, more vitalistic approaches.

The most consequential American mesmeric practitioner was Phineas Parkhurst Quimby (1802–1866), a clockmaker from Maine who began as a performing mesmerist after attending demonstrations in the late 1830s.(Whorton, 2002) Quimby made an observation that shifted everything: patients recovered even when his interventions failed to induce the expected phenomena. He concluded that what healed them was their own belief, not any magnetic manipulation. He abandoned the magnetic fluid theory entirely and developed what he called a “science of health” — a system in which disease arose from erroneous beliefs, and cure came from correcting those beliefs and engaging the patient’s own mental resources.(Haller, 2010) Robert C. Fuller would later call Quimby the “rightful father of the many self-help psychologies” that have shaped American religious and popular culture.(Haller, 2010) The mind-cure movement that grew from Quimby’s work was not, however, a single-source tradition: Haller traces its origins to Mesmer’s discoveries in combination with American Protestant perfectionism, Sylvester Graham’s physical health reform movement, and the writings of Swedenborg — four distinct currents that converged in the mid-nineteenth century into a coherent popular philosophy of healing through mental correction and spiritual alignment.(Haller, 2010)

Mesmerism also flowed into the spiritualist movement. When modern Spiritualism began with the Fox sisters in Hydesville, New York in 1848, the psychical researcher Frank Podmore argued that it stood in “direct historical succession” to animal magnetism, which had already provided Americans with a working vocabulary for altered states, clairvoyance, and invisible forces.(Haller, 2010) The antebellum reformer Robert Owen traced exactly this trajectory — from Mesmer to Swedenborg to Spiritualism — as a natural progression for those who believed the immaterial was more real than the material.(Haller, 2010) The historian Whitney Cross, analysing the antebellum religious landscape, reached the same conclusion from the opposite direction: mesmerism led to Swedenborgianism, and Swedenborgianism to Spiritualism, because American adherents understood all three as demonstrating the superiority of ideal over material force — a single continuous current flowing through different institutional containers.(Haller, 2010)

John William Haller’s retrospective thesis, drawing these threads together, argues that almost without exception, American holistic healing systems — from eclecticism, homeopathy, and mind cure through Christian Science, New Thought, chiropractic, osteopathy, and New Age medicine — are grounded in the metaphysical framework of either mesmerism or Swedenborgianism.(Haller, 2010) The shared framework was vitalistic: unseen forces, the subordination of matter to spirit, healing through restoration of an energy flow disrupted by blockage or imbalance.(Haller, 2010)

Samuel Hahnemann, for his part, had a marked fascination with Mesmer’s animal magnetism. He understood skilled mesmerizers as those with “an abundance of the subtle vital energy” essential to therapeutic contact, and though he stopped short of drawing a direct equation, he saw a clear relationship between his own principle of potentization and the energy field Mesmer had postulated.(Haller, 2010)

Hypnotism: Braid’s 1843 Reframing

The physical transformation of mesmerism into a recognizable precursor of modern psychology came through the Scottish surgeon James Braid (1795–1860). Braid attended a demonstration by a traveling mesmerist in Manchester in 1841, initially skeptical and expecting fraud. What he observed instead convinced him that something genuine was occurring — but that Mesmer’s explanation was entirely wrong. Beginning a series of systematic experiments, Braid determined that the mesmeric state could be induced simply by having subjects fix their gaze on a bright object, producing eye fatigue and a consequent alteration of the nervous system.

In 1843 he published Neurypnology; or the Rationale of Nervous Sleep, which introduced the terms “neuro-hypnotism” and “hypnosis,” and proved, to his own satisfaction and that of much of the medical world, that hypnotic phenomena were produced entirely by an impression on the nervous centers — without any fluid passing between operator and patient, and without any mystical universal force.(Ilza Veith, 1965) The phenomenon was real; the mesmeric explanation was superfluous. What remained was a genuine and repeatable alteration of the nervous system, accessible through psychological means, with demonstrable therapeutic possibilities.

Legacy: The Unconscious, Psychotherapy, and Placebo

Veith’s historical judgment is that Mesmer’s ideas, though originating in a discredited physical theory, “took firm root and are discernible indirectly as a constituent of Freudianism and directly in modern applications of hypnosis to medicine, surgery, and dentistry today.”(Ilza Veith, 1965) This is not mere whiggish teleology; the genealogy is traceable.

The path from Mesmer to Freud runs through the French schools. Charcot’s work at the Salpêtrière used hypnosis as a diagnostic tool for hysteria, and his investigations — however corrupted by patient conditioning he himself did not recognize(Ilza Veith, 1965) — helped establish that symptoms with no physical basis could nonetheless be real, disabling, and responsive to psychological intervention. The Nancy School under Liébault and Bernheim challenged Charcot by demonstrating that hypnotic susceptibility was not restricted to hysterics and that suggestion alone could produce and remove symptoms in ordinary people.(Ilza Veith, 1965) Pierre Janet, synthesizing these findings, developed the concept of “subconscious fixed ideas” as the mechanism of hysteria — ideas that formed below consciousness and needed to be excavated and confronted.(Ilza Veith, 1965) Breuer and Freud’s cathartic method, as Janet himself acknowledged, expressed the same insight: the hidden pathological content had to be brought into consciousness.(Ilza Veith, 1965)

The 1784 commission’s attribution of mesmeric cures to imagination also constitutes what one historian calls the first systematic articulation of the placebo concept: the commissioners did not deny that patients improved, but insisted that the improvement originated in the patient’s mind rather than in any external agent.(Jackson (ed.), 2011) The problem they identified — how to distinguish the effects of an intervention from the effects of expectation and belief — remains the central methodological challenge of clinical research.

The vital-energy lineage continues to the present. The concept of a subtle energy field surrounding and animating the body — traceable through Paracelsus, Mesmer’s animal magnetism, Swedenborg’s doctrine of divine influx, Hahnemann’s vital principle, and Baron Reichenbach’s Odic force — reappears in New Age healing traditions, therapeutic touch, and related systems that understand health in terms of energy balance and flow.(Haller, 2010) Folk medical traditions across cultures display a near-universal emphasis on vital energy under different names: chi, innate intelligence, orgone, vibiaciones — all variants on what Mesmer called animal magnetism.(Gevitz (ed.), 1990)

Henry Lindlahr, writing in 1918, offered a rehabilitation of Mesmer’s animal magnetism from within the Nature Cure tradition. Arguing that the French commission had evaluated mesmerism on purely materialist grounds without conducting adequate experiments, Lindlahr held that Mesmer’s therapeutic results were genuine and explicable through Baron Karl von Reichenbach’s concept of odic force: what Mesmer had been observing and applying was the transfer of vital electromagnetic energy from a highly charged organism to a depleted one.(Lindlahr, Henry, 1918) This is one of several points where Lindlahr’s vitalist synthesis explicitly reclaimed discredited or marginalized therapeutic systems as legitimate applications of the same fundamental vital-force principle that governed all of Nature Cure’s therapies.

Mesmerism’s lasting significance lies less in any specific therapy than in the questions it forced into view: Is healing always physical? Can belief cure? What is the relationship between conscious intention and bodily change? These were not questions that respectable medicine had been asking. Mesmer, for all his grandiosity and self-delusion, put them on the table.