Dr. Hoppe's book The Economics and Ethics of Private Property is among the most important modern contributions to libertarian thought. Hoppe, like Rothbard, connects laissez-faire economics to normative libertarian theory with laserlike precision and inexorable logic. Property isn't just a social construct determined by legislative fiat, but rather a necessary component of self-ownership and the foundation of a free society. Hoppe details many of the arguments made in the book during a talk entitled "A World Without Theft", delivered at a Mises Institute event in 2006. This is a fantastic talk you won't want to miss.