Every developed country in the West is essentially socialist, providing basic services like healthcare, education and housing to all by redistributing wealth. There are big differences in the degree, but not in the principle. By creating a vast middle "class" where people can see the value of working hard, and the benefit of working within the rules, socialist democracies have reduced the number of people that have nothing to lose and those that have no respect for society's laws. That curtails violence in general and removes a lot of tinder that firebrands can use to rally nations to war. It's no surprise that the least socialist nation is also the most violent and warlike.