First, thanks for an interesting and informative article.

Nozick basically echoed the words of John Locke from about three centuries earlier. The fundamental problem of libertarianism is that is starts from the premise of a radical form of individualism: humans living as isolated, utterly independent beings in a "State of Nature."

Human beings have never lived that way. We are social beings: we live together in groups. We do now; we always have; we presumably always will. It is simply ludicrous to base an idea of justice for social beings on their existing as asocial beings.