Create a national register of violent offenders freely accessible to the public.
Obviously, first strike violence is the biggest problem on Earth, much more destructive and painful than nonviolent crimes. This creates a national database with the names of all people ever convicted of a violent crime. This allows people to see if a person has been convicted of a violent crime if they are thinking about hiring, dating, or trusting a person. Currently, many people might be hiring somebody convicted of murder or multiple assaults to watch their kids without even knowing it. It sends a message to people: don't commit first strike violent crime, and solve your differences non-violently.