Randy Barnett is arguably on the short list of the libertarians most influential in American public life. His legal scholarship has informed challenges to state power in the courts; indeed, he himself has argued before the Supreme Court. He has been an active participant in intra-libertarian theoretical debates for decades. And his book The Structure of Liberty, now in its second edition, articulates a clear and appealing model of a stateless legal order that has contributed helpfully to libertarian theory over the course of a quarter-century. Thus, when Barnett urges, as he does in a new...