Looking at https://en.wikipedia.org/wiki/List_of_countries_by_intentional_homicide_rate https://en.wikipedia.org/wiki/List_of_countries_by_intention..., I suspe

Looking at https://en.wikipedia.org/wiki/List_of_countries_by_intentional_homicide_rate https://en.wikipedia.org/wiki/List_of_countries_by_intention..., I suspect it has more to do with average wealth / standard of living combined with wealth inequality. "Social cohesion", whatever that means, is probably correlated, but I wouldn't be sure it's the underlying cause.