Robert Nozick's Anarchy, State and Utopia is in large measure an ingenious elaboration of an argument for capitalism adumbrated by Plekhanov. The capitalism Nozick advocates is more pure than the one we know today. It lacks taxation for social welfare, and it permits degrees of inequality far greater than most apologists for contemporary bourgeois society would countenance. The present paper paper is only indirectly a critique of Nozick's defense of capitalism. Its immediate aim is to refute Nozick's major argument against (...) a rival of capitalism, socialism. The refutation vindicates socialism against that argument, but no one opposed to socialism on other grounds should expect to be converted by this paper. (shrink)