Youth crime had plummeted to historic lows over two decades. The specter of violent young “super predators” who inspired fear in the mid-1990s had faded. Yet this shift remained largely unrecognized and unexplored, its implications misunderstood by policymakers. The Chronicle set out to measure the crime drop and determine what it meant. The result was “Vanishing Violence,” a series that not only documented plunging crime but revealed harmful and costly failures by leaders to respond to the historic trend.