I just ran across this (five-year-old) post of mine that seems relevant to the recent discussion (which has a fascinating discussion by Carl Pham in comments on the nature of law, dictatorships and the state):

As a comment outside the context of the debate, Dr. Kurtz’ position is one shared by many, but the point is not that space is by its nature a libertarian utopia, any more than (and yes, I know he dislikes the analogy, but that doesn’t make it invalid) were the Americas two and a half centuries ago. Yet somehow we created a form of government here previously unseen in the history of the world, that was quite libertarian in philosophy (certainly much more so than either major party today).

From the standpoint of forming new societies, the point of settling space is that it’s a tabula rasa, and that many different groups and ideologies will find room there to do social experimentation. This is a factor that is independent of technology. Yes, cooperation will be required, and perhaps even laws, but there’s nothing intrinsically unlibertarian about that. Ignoring teleological arguments about our duty to be the vessels that bring consciousness to the universe, this is to me the greatest value of space–an ongoing large petri dish in which groups of like-minded people can continue to seek improvements on society, unconstrained by existing governmental strictures that are now dominant on this planet.

There’s some good discussion in comments there as well.