Debates over the privatization of formerly public industries and services are common in contemporary politics. The overall goal of this paper is to suggest a normative framework within which deliberations over public ownership might take place. I draw this framework from Plato's Republic, which I claim justifies public ownership as a means for ensuring that citizens labour as craftsmen rather than moneymakers; according to Plato's social ontology, only craftsmen can constitute a genuine society and hence enjoy access to the full (...) array of goods for the sake of which society comes into existence. This justificatory structure implies that public ownership is only a means for ensuring the appropriate teleology of labour; if there turn out to be better means, so be it. But what does turn out to be indispensable on this view, as G. A. Cohen understood, is an ethos of justice, especially among those in charge of regulating social institutions. (shrink)