0:00 In the summer of 1518, the city council of Strasbourg had a problem: hundreds of their citizens were dancing uncontrollably in the streets.0:10 So they prescribed a cure.0:13 Their official medical advice was… more dancing.0:16 This feels like a good follow-up to our chat about strange phenomena, because this one is a classic.0:24 The city authorities genuinely believed the dancers were suffering from "hot blood," and the only way to sweat it out was to keep them moving.0:35 They literally hired musicians and built a stage.0:39 It all started with one woman.0:42 On July fourteenth, a woman named Frau Troffea walked out of her home and just… started dancing.0:49 No music.0:50 She just danced.0:51 She didn't stop for nearly a week.0:54 By the end of that week, thirty-four other people had joined her.0:59 By August, the number was up to four hundred.1:03 And this wasn't joyful dancing.1:05 Accounts from the time describe people with vacant eyes, thrashing their arms, their feet bleeding, crying out for help even as their bodies kept moving.1:17 Some literally danced until they died from heart attacks, strokes, or pure exhaustion.1:24 The city's "cure" was, of course, a catastrophe.1:28 Putting everyone together in a public space just made it spread faster.1:33 So what was going on?1:35 The first place people go is the tidy, biological explanation.1:40 The ergot poisoning theory.1:42 It sounds perfect.1:44 Ergot is a fungus that grows on damp rye, which was a staple food.1:49 It produces chemicals that are precursors to LSD.1:53 So, you get hallucinations, muscle spasms… dancing.1:57 It fits, right?1:58 Well, here's the problem.2:00 Ergot also causes gangrene and restricts blood flow to the extremities.2:05 It makes your limbs feel weak and painful.2:09 You wouldn't be able to dance for an hour, let alone for days on end until you collapsed from exhaustion.2:17 The biology just doesn't hold up to the physical reality of what these people did.2:23 So if it's not a poison… what is it?2:26 The more compelling answer is so much stranger.2:30 It's called mass psychogenic illness.2:33 Think of it as a software glitch in the human psyche, triggered by extreme stress.2:39 And Strasbourg in 1518 was about as stressed as a society can get.2:45 They had just been through a brutal famine.2:48 Disease was everywhere—syphilis, smallpox, something they called "the English Sweat." There was immense religious and political upheaval.2:59 People were terrified, starving, and convinced that God was punishing them.3:05 And this is where we see the pattern.3:08 This isn't just a historical oddity; it's a model for social contagion.3:13 When a population is under unbearable, inescapable stress, the pressure has to go somewhere.3:21 The belief in divine punishment was so strong that their minds literally manifested a physical penance.3:29 The dancing wasn't the disease.3:31 The dancing was the symptom of a society at its breaking point.3:36 It’s like a financial panic, but for the body.3:40 A shared belief becomes so powerful it rewrites physical behavior on a massive scale.3:47 The authorities saw a medical problem and prescribed a physical cure.3:52 But they were treating the symptom, not the cause.3:56 The plague eventually burned itself out by September, after the council banned all dancing and sent the afflicted to pray at the shrine of Saint Vitus.4:08 But the real story here isn't the dancing itself.4:12 It’s that the people in charge, with the best knowledge they had at the time—Galenic medicine, theories of the humors—came up with a solution that was the exact opposite of what was needed.4:27 They looked at a psychological fire and decided the best thing to do was pour gasoline on it.4:34 The Dancing Plague of 1518 isn't a story about a mysterious disease.4:39 It's a story about what happens when a society's coping mechanisms are the very thing that pushes it over the edge.
