Want an example of a working anarchy, without resorting to ancient Iceland or Ireland? How about the Roman Catholic Church? It is a political entity under international law (the Holy See--technically, the State of Vatican City). As far as I know, it imposes no taxes, instead collecting money voluntarily from the one billion Catholics around the world; and does not impose its jurisdiction on unwilling participants--its "citizens," so to speak, are the one billion Catholics living under the jurisdiction of others states. So who says voluntary government is impossible?