Libertarianism and Foreign Policy

Randy Barnett at The Volokh Conspiracy writes again about libertarianism and foreign policy. He kindly mentions my posts on the subject (here and here). He also quotes some libertarian readers who are "defenseists" ("let the other guy shoot first") and others who, like me, don't believe in passivity. I'll come back to this subject. For now, I just want to acknowledge Barnett's latest post and thank him for the links.