Mr. Bartley really believes in open immigration: WFB: "You can't imagine a situation in which everybody who wanted to come to America could just plain come, because it would give us a social overhead that we simply couldn't stand. Won't you begin your generality by accepting an empirical limit on it?" RB: "Not as an ideal." Dr. Abernethy comes along with a bucket of cold water: "Remember, Hong Kong may be much closer to a libertarian society than we are.... We have a government that has undertaken to provide health care, food stamps, subsidized housing, cash payments in the form of Aid to Families with Dependent Children, plus public education... So if we are libertarian in implementing just one policy, and that policy is open borders, we become a welfare magnet for the whole world." And we're off and running on a stimulating and useful debate.