The most vicious critics of Nozick are certainly his fellow Libertarians, including Murray Rothbard who Nozick refers to as important in converting him to a Libertarian point of view.
Though I was already acquainted with the idea that Capitalist Libertarians/Anarcho-Capitalists are a quarrelsome lot and that most of them are on the fringe of the academic world, I was startled by the response of Libertarians to Nozick. Nozick is by some way the most distinguished representative of that point of view in academic philosophy.
Murray Rothbard, and his followers, express great jealousy of Nozick’s success, claiming that Rothbard’s Ethics of Liberty is a more important book.
Anyone who compares Rothbard’s book with Nozick really ought to feel embarrassed for Rothbard, and his followers, that they could be so self-deceiving and foolish as to think Rothbard’s book is better. His method of argument is constant restatement of the view that the state is unnecessary, and that left to themselves, people will create better voluntary arrangements.
His method of dealing with different points of view is to insult them and to fall back on an analogy between the state and a supplier of goods or services in a market economy based on rules of a kind which have always been enforced by the state. Just like Anarcho-Communists, Rothbard relies on natural intuitions of Natural Law to substitute for the role of the state. Again the universality of these intuitions is asserted rather than argued for.
The fact that Nozick’s book is composed from a variety of detailed arguments for his position is used against him by the Rothbardians, apparently people just read those arguments separately which is supposedly easier than reading Rothbard’s book through. There is nothing difficult about Rothbard’s book apart from the boredom resulting from his constant under argued assertions.
Jealousy is never far from the surface.
The fact that Rothbard never had a job at a famous institution clearly embittered him and his followers.
Rothbard appears to have been a generous and inspiring person in some respects, but somewhat lacking in a sense of proportion about his importance and the quality of his essentially polemical work. Nozick was a professor at Harvard, and even worse is very generous about the work of his famous left-liberal colleague John Rawls.
Generosity to non-Libertarians is not widespread in Libertarian culture; they find it hard enough to be generous to each other. Nozick appears to have been a sensitive, understanding and well rounded individual who did not try to dominate other people or establish a clique of loyal followers. He was certainly a misfit on Planet Libertarian