Robert Nozick Quote
Though the framework is libertarian and laissez-faire, individual communities within it need not be, and perhaps no community within it will choose to be so. Thus, the characteristics of the framework need not pervade the individual communities. In this laissez-faire system it could turn out that though they are permitted, there are no actually functioning "capitalist" institutions; or that some communities have them and others don't or some communities have some of them, or what you will.
Ch. 10 : A Framework for Utopia; The Framework as Utopian Common Ground, p. 320 - Anarchy, State, and Utopia (1974)