Mass shootings did not only start happening a few decades ago. The Texas University shooting occurred in '66. That seems to line up with a timeline of surplus cheap, military grade firearms trickling into society.
when my my mom went to the same high school I did, 30 years earlier (70s), kids would leave hunting rifles and shotguns in racks in their unlocked pickup trucks in the school parking lot and nobody gave a shit or felt threatened at all whatsoever. nobody stole these guns and used them to commit crimes, at the school or elsewhere.
