Geolibertarianism is a political movement and ideology that synthesizes libertarianism and geoist theory, traditionally known as Georgism. Geolibertarians generally advocate distributing the land rent to the community via a land value tax as proposed by Henry George and others before him. For this reason, they are often called single taxers. Fred E. Foldvary coined "geo-libertarianism" in an article so titled in "Land and Liberty". In the case of geoanarchism, a proposed voluntaryist form of geolibertarianism as described by Foldvary, rent would be collected by private associations with the opportunity to secede from a geocommunity and not receive the geocommunity's services if desired. The political philosopher G. A. Cohen extensively criticized the claim, characteristic of the Georgist school of political economy, that self-ownership and a privilege-free society can be realized simultaneously, also addressing the question of what egalitarian political principles imply for the personal behaviour of those who subscribe to them. In "Self-Ownership, Freedom, and Equality", Cohen argued that any system purporting to take equality and its enforcement seriously is not consistent with the full emphasis on self-ownership and negative freedom that defines market libertarian thought. Tom G. Palmer has responded to Cohen's critique.