Lack of parental control is number 2. Lack of processes to identify and proactively deal with these people before a shooting happens is number 3. But the number 1 problem is guns. We all grew up and had issues with our classmates. When it got to the point where it was intolerable we beat the shit out of each other. No guns and no knives. There was no one who had a gun back then. Now there is access one way or another for children to access guns to settle there issues. Guns vs. fists. Black eye vs. death.