In the USA there are daily shootings and massacres. One can regulate the problem economically and collect all the weapons. Possibly also curb the cult around their mass murderers or be a little more careful with the presentation of violence in the media.
But you can also build a car with electric door handles and pepper spray that looks like a tank. Especially in times of climate change this solution seems to be the best.
Update:There where a few Mails with reasons why US People are in war with themselfes. Sure - Police, White Power, Q-Anon... that all are reasons as well.
But keep in mind that these are sympthoms of major Problems. Happy (and smart) People doesn't think: Hey let's kill someone out there.
The longer I keep thinging about it seems to be the, that quality of schools and values they teach you, is the problem.