In the dreamland libertarians seem to live in.

At least to the point that the society is left to itself without being invaded. That was the issue for the anarchist experiment in 1930s Spain, it was shut down by fascists and Soviet-aligned communists. Would it have survived if left to itself? I guess we'll never know.

I find the general unwillingness to experiment with alternative models of society, whether they are libertarianism, or anarchism, or whatever, quite disappointing. A few "special economic zones" doesn't seem like too much to ask for.

Instead, we just replicate the same old model, which these days is a mixture of capitalism and government authority. The government authority supposedly either suppresses the worst outcomes of capitalism, or is a source of corruption and abuse in itself. Now we have well over 100 such governments around the world, with varying degrees of success for the majority of their populations, and I'm not sure we are really learning anything.