The lack of scientific knowledge also fanned the flames of anti-Semitism and consigned Jews to man-made fates arguably worse than the disease itself. Theories abounded as to the source of the pestilence. Punishment for corporeal or theological sins was a perennial explanation, as were the evil eye and the “miasma” (poisoned, if colorless, air). But by far the most pernicious theory held that Hebrews were poisoning wells. This delusion ignited panic among Christians. As a result, thousands of Jews falsely confessed to this imaginary crime under torture and then were burned at the stake or
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