Keep in mind that the original post described the "study" as pertaining to violence among "ordinary" children in "ordinary" schools. Decode that and it reads: "white suburban teenagers in adequately funded schools." High violence in inner-city schools (decoded as: largely black/hispanic students or simply - disproportionalely non-white schools in poor areas) has been glossed over or flat- out ignored because it pertained to "Them" and not "Us." Violence in schools only became an issue when it moved into white suburban schools. This isn't a new phenomenon.