Turn things around albeit slowly. Work to eliminate poverty and bullying. Help single parents rsise happy, healthy children. If a mother or father or couple has trouble with their kid or kids, get them help. Counselling. Regular check ins. Make sure they are supported. If the child cannot be well or changed, put them in a facility. After age 18, reevaluate them. Do not set them free. Start when the child is young. In the formative years. Long before adolescence. This is a start. Make reports of gun concerns in teens addressed before the killing starts. Have teams of people monitoring social media for threats from teens or younger. Identify possible at risk kids. When shooters enter schools, let teachers who know how to use firearms use them to protect. Indicate by clear signsge that dhooters will be killed immediately. Enough death in scholls. Enough is enough.