An article by Malcolm Gladwell on school shootings.
School shootings are a modern phenomenon. There were scattered instances of gunmen or bombers attacking schools in the years before Barry Loukaitis, but they were lower profile. School shootings mostly involve young white men. And, not surprisingly, given the ready availability of firearms in the United States, the phenomenon is overwhelmingly American. But, beyond those facts, the great puzzle is how little school shooters fit any kind of pattern.
Needull in a haystack 