As an aside: I've been waiting for Libertarians to declare Somalia to be heaven on earth. I wonder why they've never picked up on the obvious real-world example of a nation with no central state government with a monopoly on violence?
You probably haven't looked that hard. Somalia case studies are ubiquitous in libertarian (anarchist-leaning) circles. The general claim seems to be that, yeah, stateless Somalia is way worse than high-functioning governments like the United States, but better than its neighbor states and better than it was before it became stateless. Leeson's article is probably the best on the topic: http://www.peterleeson.com/Bett…
That article reads a little tone deaf, a lot of the data ignores an entire 10 year period of total fucking chaos.