Block further argues that imperfect present conditions of state-imposed migration barriers do not give license to libertarians to oppose open immigration.
[6] The libertarian Cato Institute has been arguing in favor of liberalized immigration for over forty years and often criticizes the current system as antiquated, unfair and often maliciously conceived.
[7] Political philosopher Adam James Tebble argues that more open borders aid both the economic and institutional development of poorer migrant sending countries, contrary to "brain-drain" critiques of migration.
In The Ethics of Liberty, Rothbard argued that the question of immigration could be adequately resolved within a libertarian society, where all streets and land would be privately owned.
[11] He argued that policies of open immigration enforced by the state are antithetical to liberty:"A totally privatized country would be as 'closed' as the particular inhabitants and property owners desire.
[12] As Hoppe states in his article "The Case for Free Trade and Restricted Immigration", "It is precisely the absolute voluntariness of human association and separation—the absence of any form of forced integration—which makes peaceful relationships—free trade—between racially, ethnically, linguistically, religiously, or culturally distinct people possible.
"[12] Moreover, Hoppe stresses that the political climate in the Western democracies has made the situation even more dire, as the welfare policies of these countries imply that immigration will lead to economic devastation.
"[13]Even if the current situation of democratic central states does not approximate the anarcho-capitalist ideal, Hoppe still thinks that one can still advocate for policies that align more closely with libertarianism.