The argument over the moral underpinnings of libertarianism basically boils down to the fact that there is necessarily a communitarian element to ethics. If we accept that libertarianism means radical individualism, then libertarian ethics appears to be an oxymoron. And for those libertarians who do believe in the Cartesian form of individualism as the basis of libertarianism, it likely is an oxymoron. I’m not sure a libertarianism whose philosophical underpinnings are the same as those that gave us the French Revolution (especially the Terror), Naziism, and Communism is the kind of libertarianism we really want.