It's gotten worse since we stopped executing murderers within 3 years of conviction, and a revolution in combat medicine (mainly from the Vietnam War) significantly improved the odds of shooting victim survival in emergency rooms. Aggravated assaults per capita have almost tripled, but homicides per capita have remained flattish since 1960.
Executed or no, someone in prison can’t get involved in dissing incidents on the street. As for lack of survivors, ever hear of family feuds?
You do have a helpful note in your tag. Faith in God needs to be found by every generation. The previous generation can not just bequeath it to them willy nilly, though it can try to teach and preach it. Anyhow, the difference between these losers of life living like this and being saved could be only a missionary and a decision away.