You may wish to actually look up the Heinlein quotation and its context:
> To begin with, the quote isn’t a Heinlein quote any more than “I seen that black n****** yonder ruttin’ on my Mayella!” is a Harper Lee quote. The “polite society” line comes from a Robert Heinlein character in the novel Beyond This Horizon. That character is a privileged product of generations of eugenics. He lives in a society where genetic manipulation has extended lifespans and overpopulation is a prime concern. In that world, dueling has been re-introduced not because it makes people “polite” but because it kills people. And the character likes it because he believes it specifically kills those lesser people, those genetically inferior people, who need to be weeded out to make room for the übermensch to thrive.
* https://www.dailykos.com/stories/2019/9/2/1881430/--An-armed...
* https://en.wikipedia.org/wiki/Beyond_This_Horizon#In_popular...
Further:
> There are two problems with this line of thought. First, there is plenty of evidence that it is not true. Second, even if it were true, we shouldn't settle for this kind of "politeness."
* https://www.psychologytoday.com/ca/blog/ethics-everyone/2022...
I also do not think lethal force is the primary reducer of crime for a country, I think it has more to do with social safety net available and income inequality and things like that - and guns won't help with those factors.
Then of course you have to add El Salvodor, Honduras and their neighbors being a free train ride away to the mix.
One thing to reduce violent crimes is not going to stop all crime anywhere, especially here.
Arguments and differences escalating to shoot outs.
Sounds like Utopia... in the 5th circle of hell.