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لیبرترینها این مفهوم را در مسئلهٔ بردگی داوطلبانه که موری راتبارد آن را نامشروع و حتی ضد و نقیض میدانست، داوطلبانه مرکزی می دانند.
this concept has been recognized by libertarians as being central to the question of voluntary slavery, which murray rothbard dismissed as illegitimate and even self-contradictory.