Wade Davis and the 'zombie powder'
In 1982 Harvard ethnobotanist Wade Davis went to Haiti to find the poison said to make zombis. He proposed a powder with tetrodotoxin from pufferfish, and described Bizango secret societies as the enforcers who used it.
1982 CE · 18.54, -72.34 · status: disputed
The account
His book The Serpent and the Rainbow (1985) became a bestseller and a horror film. Davis argued that zombification was a social punishment, not a fantasy.
The sceptical view
Chemists who analysed his samples found little or no tetrodotoxin, and critics questioned his methods; Davis defended his work. The theory remains unproven.
The researched reading
An anthropologist’s attempt to explain zombis by a poison and a social system. The pharmacology is real but unproven in his samples; psychiatry and culture explain the rest.
| Explanation | Weight | Why |
|---|---|---|
| A known natural phenomenon | 38% | Tetrodotoxin can cause deep paralysis that mimics death, and Haitian powders contain pufferfish; this is a real pharmacological basis, even if the samples Davis brought back contained little or no TTX. |
| Perception, memory or mind | 28% | Later psychiatric studies of reputed zombis found mental illness, learning disability and mistaken identity; belief in zombification also operates through fear and social control. |
| A cultural story | 22% | Zombification is rooted in Vodou belief and in punishment by secret societies; Davis’s social interpretation is plausible, but the bestseller and film added a sensational frame. |
| A hoax or fabrication | 7% | Critics questioned whether samples were genuine or adulterated, and whether informants told Davis what he wanted. |
| Something in the surroundings | 3% | Other toxic plants and conditions on plantations might add to the effect. |
| Genuinely anomalous | 2% | Nothing here needs more than pharmacology, psychiatry and culture. |
Official position: No official finding; chemists and pharmacologists disputed the TTX results.