On a summer night in 415 BCE, unknown persons systematically mutilated most of the domestic “herms”—guardian statues of the god Hermes—in Athens. The reaction was immediate and extreme:  the Athenians feared a terrifying conspiracy was underway against the city and its large fleet—and possibly against democracy itself.   The city established a board of investigators, which led to informants, accusations, and flight by many of the accused.  Ultimately, dozens were exiled or executed, their property confiscated.