Natural Law and the Non-Aggression Principle
The strand of libertarian thinking anchored in the work of Murray Rothbard and Ayn Rand gives pride of place, as far as political ethics are concerned, to the non-aggression principle (NAP), which holds that no one may initiate force against another person. As commonly read in libertarian circles, the principle precludes the initiation of force against someone else’s property as well as her person. (For convenience, we can call these the person-aspect and the property-aspect of the NAP.) Leonard Read (who did not, perhaps, take it quite seriously enough) famously summed up this principle by observing that it was compatible with “anything that’s peaceful.” In this post, I want to ask whether an important expositions of the natural law tradition in which Rothbard and Rand were both rooted can ground something like the NAP. Rothbard emphasized in The Ethics of Liberty that the natural law theory he offered there was a theory of politics, that is, as he put it, of “the just use of force...