Does Libertarianism Require Support for Open Borders?

Dave Smith makes the Rothbardian/Hoppean case for government restriction on immigration, arguing that it's a second-best solution given the undeniable fact of government control of "public" property. Bob plays devil's advocate to raise possible objections to Dave's framework. Rothbard, "Nations by Consent": Mises.org/HAP436a Hans-Hermann Hoppe, "On Free Immigration and Forced Integration": Mises.org/HAP436b Bryan Caplan, "A Radical Case for Open Borders": Mises.org/HAP436c   Human Action Podcast listeners can get a free copy of Dr. Guido Hülsmann's How Inflation Destroys Civilization: Mises.org/HAPodFree Enter to win free admission to the Human Action Conference: Mises.org/HARaffle