The idea IP rights are “uniquely statutory” is a myth peddled by libertarians.

In short, the libertarians advancing the false distinction between “common law property in land” versus “statutory IP rights” are misstating what it means when we all say that the Anglo-American property system is rooted in the “common law.” In the technical sense of this term, the Anglo-American property system is a common law system insofar as courts have developed the law and the rationale for their decisions without having to validate these decisions by reference to a particular statute. This is in contrast to the “civil law” system in Europe, in which all judicial decisions must ultimately refer back to a statute as the validating source of the judicial decision itself. But to say that the Anglo-American property system is a “common law system” does not mean, of course, that there weren’t statutes that were interpreted, applied and extended by courts, and as a straightforward historical fact there were many statutes enacted by Parliament that defined the foundational rights in Anglo-American property law. The fact that statutes weren’t mandated by the Anglo-American legal system as an institutional requirement for valid court decisions does not mean that statutes did not play a substantial historical role in the creation and enforcement of property rights in land.

In sum, it’s a complete myth for libertarians to argue that IP rights are “different” from property rights in land because property rights in land developed in “common law” as opposed to “statutory” IP rights. But it’s even worse than a myth, because this is not a false claim made in the ivory tower in a dispute between academic historians. Rather, this false historical claim is asserted in the policy debates today to advance an anti-IP agenda. Thus, it’s important to call out this misleading historical myth, as it’s being used to leverage misleading attacks on copyright and patents. I don’t mind engaging in bracing public policy debates about whether IP rights are right or wrong — I love these debates, especially with people who share my own commitment to free market principles — but let’s at least get the basic historical facts correct in these debates. These are facts that are not in dispute and are well known, including even to the libertarians who survived their 1L Property classes in law school and are now speaking on these issues in the academy and in think tanks.