The truth, of course, is that libertarianism wants to advance principles of property but that it in no way wishes to defend, willy nilly, all property which now is called private. Much of that property is stolen. Much is of dubious title. All of it is deeply intertwined with an immoral, coercive state system which has condoned, built on, and profited from slavery; has expanded through and exploited a brutal and aggressive imperial and colonial foreign policy, and continues to hold the people in a roughly serf–master relationship to political–economic power concentrations.

"Letter From Washington," The Libertarian Forum 1, no. 6 (15 June 1969), p. 2