This Article offers a critical examination of Eric Claeys’s argument for natural property rights, focusing in particular on the questions of self-ownership and the so-called “Lockean proviso.” It argues that while Claeys is generally on the right track in his argument for natural property rights, he errs in omitting a self-ownership argument, some version of which is necessary for a proper naturalistic account of property, and that the Lockean proviso is neither necessary for such an account nor defensible in its own right. I conclude that the concerns animating the Lockean proviso argument are adequately dealt with by an alternative argument: that one has a right to equal participation in an existing property rights scheme