What distinguishes Rothbard's book is the manner in which it roots the case for freedom in the concept of natural rights and applies it to a host of practical problems. An economist by profession, Rothbard here proves himself equally at home with philosophy. And while his conclusions are radical—that a social order that strictly adheres to the rights of private property must exclude the institutionalized violence inherent in the state—his applications of libertarian principles prove surprisingly practical for a host of social dilemmas, solutions to which have eluded alternative traditions. The Ethics of Liberty authoritatively established the anarcho-capitalist economic system as the most viable and the only principled option for a social order based on freedom. The current edition is newly indexed and includes a new introduction that takes special note of the Robert Nozick-Rothbard controversies.