Charles Richet

Charles Richet: The Physiologist Who Discovered That the Body Can Overreact

On a research yacht in the Mediterranean, at the invitation of Prince Albert I of Monaco, Charles Richet and his collaborator Paul Portier injected dogs with toxin from the venomous tentacles of the Portuguese man o'war. The animals survived the small first dose without trouble. Weeks later, a second dose — far smaller than the first — killed them within minutes. Richet had discovered the opposite of immunity: a phenomenon in which prior exposure to a substance makes the body catastrophically more sensitive to it, not less. He named it anaphylaxis, and it won him the 1913 Nobel Prize in Physiology or Medicine — one part of an extraordinarily wide-ranging and, in significant respects, deeply troubling career.

A Physician's Education in Paris

Richet was born on August 26, 1850, in Paris, the son of the surgeon Alfred Richet. He was educated at the Lycée Bonaparte before pursuing medical studies at the University of Paris, where his internship placed him at the Salpêtrière Hospital under the neurologist Jean-Martin Charcot, observing the era's controversial and still-forming understanding of what was then diagnosed as hysteria. That early exposure to a field where scientific method and unproven theory sat uneasily together would recur, in different forms, throughout Richet's own career.

From Digestion to a Chair at the Collège de France

Richet built a conventional and genuinely distinguished physiological career alongside his more famous later work. He was appointed professor of physiology at the Collège de France in 1887, was elected to the Académie de Médecine in 1898, and joined the Académie des Sciences in 1914. His mainstream research spanned neurochemistry, digestion, and thermoregulation in warm-blooded animals, and with the chemist Maurice Hanriot he co-discovered the sedative and analgesic drug chloralose. It was serious, respected physiological work, conducted at the same time he was pursuing far stranger questions on the side.

Anaphylaxis

The discovery that made Richet's scientific reputation permanent came in 1901–1902, during an oceanographic expedition aboard Prince Albert I of Monaco's research vessel. Working with Paul Portier to study the toxins of jellyfish-like sea creatures, Richet found that dogs given an initial, non-lethal dose of toxin from the Portuguese man o'war did not become tolerant to a second dose administered three weeks later, as classical immunology would have predicted — they instead reacted with sudden, often fatal shock, at doses far too small to have harmed them the first time. Richet named the phenomenon anaphylaxis, from the Greek for "against protection," in 1902, and the concept reshaped the understanding of allergic and hypersensitivity reactions across medicine. The Nobel committee recognized him alone for the work in 1913, "in recognition of his work on anaphylaxis" — the sole Nobel laureate that year, crediting one specific and precisely defined discovery.

The Sixth Sense and Its Frauds

Richet's scientific curiosity did not stop at conventional physiology. In 1891 he founded the journal *Annales des sciences psychiques* and spent decades investigating mediums, including Eusapia Palladino, Eva Carrière, and Leonora Piper, coining the term "ectoplasm" in 1894 for the substance mediums claimed to externalize during séances. He served as president of the Society for Psychical Research in London in 1905 and later as full-time president of the Institut Métapsychique International from 1930. Richet explicitly rejected spiritualist explanations for what he observed, proposing instead what he called a "sixth sense" — writing that "the hypothesis of the sixth sense is a new physiological notion which contradicts nothing that we learn from physiology." But his investigations were repeatedly and publicly embarrassing: the medium Linda Gazzera was exposed as fraudulent in 1911, and the self-proclaimed "Spaniard with X-ray Eyes," Joaquín María Argamasilla, was exposed by Harry Houdini in 1924, after Richet had lent the claim credibility. The historian Ruth Brandon later characterized Richet's pattern bluntly, describing "his will to believe, and his disinclination to accept any unpalatably contrary indications" — a serious scientist whose rigor in the physiology laboratory did not extend to the séance room.

Eugenics and Racism

Richet's record includes views that were not merely of their era but actively harmful in their application. He was an ardent proponent of eugenics, advocating sterilization and marriage prohibition for people with mental disabilities in his 1919 book *La Sélection Humaine*, and he presided over the French Eugenics Society from 1920 to 1926. The psychologist Gustav Jahoda documented that Richet held explicitly racist views, describing him as "a firm believer in the inferiority of blacks" and recording that Richet compared Black people to apes and to people with intellectual disabilities. These positions sit uncomfortably alongside his scientific achievements and are inseparable from any honest account of his career.

Family and Interests

Richet's intellectual range extended still further: he was an aviation pioneer, a pacifist who led French delegations for peace societies from 1902, and a published writer across history, sociology, philosophy, psychology, theater, and poetry. His son Charles and grandson Gabriel Richet continued the family's medical line, with Gabriel becoming a pioneering figure in European nephrology.

Why Charles Is Called a Genius

Richet's claim to scientific genius rests on a single, precisely bounded achievement: recognizing, from an unexpected and fatal experimental result, an entirely new physiological principle — that repeated exposure to a substance can sensitize rather than protect — and naming and defining it clearly enough that it became a permanent category of medical understanding, still in daily clinical use as "anaphylactic shock." That is real conceptual originality, the kind the Nobel committee isolated and rewarded on its own terms. But an honest accounting cannot stop there. The same appetite for pattern and explanation that let Richet identify anaphylaxis also led him, in psychical research, to repeatedly credit fraudulent mediums and to hold and publish racist and eugenicist views presented as scientific conclusions. Richet was not a uniformly rigorous mind applying consistent standards across every domain; he was a genuinely original physiologist whose critical judgment failed badly outside the narrow area where his greatest discovery lay.

Legacy

Richet died in Paris on December 4, 1935. Anaphylaxis remains one of medicine's essential concepts, underlying the modern understanding and emergency treatment of severe allergic reactions to food, insect stings, and medication — a discovery whose value is undiminished by the far darker and more dubious pursuits its discoverer chose to fill the rest of his working life.

Achievements

• Nobel Prize in Physiology or Medicine — 1913
• Grand Officer of the Legion of Honour — 1926
• Notable work: Q105946778
• Held posts at Collège de France
• Educated at University of Paris
• Fields of research: Esperanto, allergology, anaphylaxis and creative and professional writing