Socialism will most likely be the thing that sends Europe and the rest of the world into the tank, but it does not appear to have led to violent crime in European countries.
http://en.wikipedia.org/wiki/List_of_countries_by_intentional_homicide_rate
We are not speaking of the rate of violence throughout all of a nation or a continent, but in specific racial or ethnic groups. I am comparing crime in low-income urban populations, black and white, in the US and UK. Both populations are disproportionately violent and dysfunctional, and both populations are the recipients of misguided left-liberal policies. My premise is that leftist policies have had the same negative effect on both groups and that it is this effect, not some innate genetic flaw, that makes both groups produce a higher number of nonproductive and/or violent individuals than the rest of the population.
If you do not accept that left-liberal policies have had a deleterious effect on these groups, to what would you ascribe their greater tendency to crime, violence, addiction, pregnancy, and other dysfunctions? It’s certainly not racial in origin, since we see the same phenomena in white lower-class Britons as in black lower-class Americans.