To see these weaknesses, consider the example that I raised in the prologue, the murders of twenty children and six adults at Sandy Hook Elementary School in Newtown, Connecticut, in 2012. Why did this give rise to such a powerful reaction? It was a mass shooting, and over the last thirty years in the United States, these have caused hundreds of deaths. This is horrible, but the toll from these mass shootings equals about one-tenth of 1 percent of American homicides, a statistical nonevent. (That is, if you could wave a magic wand and end all mass shootings forever, nobody looking at the
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