I ran across an odd graph:
http://hubpages.com/hub/A-Libertarian-Dictatorship
I'm not sure of the logic behind the graph, but it did get me thinking about the connection between libertarianism and dictatorships.
Methodologically it does make sense. Weak central governments do make for a power void. This type of power void is usually filled in by a dominant group fronted by a charismatic leader -- the classic dictatorship model.
It reminds me of South American dictatorships, where it was everybody for himself. The only rule to survival being to stay on the right side of the dictatorship. Other than that the rules we're minimal.
