In 1666, a mild-mannered London haberdasher named George Viccars received a flea-infested bolt of cloth from London — and within days, the village of Eyam, England, made one of the most astonishing collective decisions in human history: they voted to quarantine themselves from the world and wait to die. But the story your textbook skipped is *why* they actually did it, who was quietly pressuring them to stay, and the bizarre accounting ledger a local rector kept that accidentally became one of the founding documents of modern epidemiology.