Somalia was a land without a government for a very brief period. It now (and has, for many years) has several governments in different regions. Some are based on Sharia (or at least purport to be), others on Guurti (traditional clan-based government). None are or claim to be based on libertarian principles.
None of it's governments are recognized by the UN, but as far as I'm aware, no one claims that the mere withdrawal of UN recognition of a government leads to prosperity.
>None are or claim to be based on libertarian principles.
I think part of the argument is that if libertarianism is so good / efficient / other desirable criteria, why don't societies naturally evolve into those societies?
Again, I don't think that this is the entire argument, or even a particular good one (in the case of somalia). I'm just pointing it out.
None of it's governments are recognized by the UN, but as far as I'm aware, no one claims that the mere withdrawal of UN recognition of a government leads to prosperity.