 The implication of this account of justice in acquisition is that any regime of private property rights is just only provided that every person living under said regime is able to achieve Wi—the welfare level that they would have been able to achieve in a world in which all external resources remain unowned. Many libertarians, including Nozick, express optimism that a private property regime will be able to provide people with the opportunity to achieve this welfare level. But it is conceivable that in the normal operation of the economy, a private property regime might at some times, for some people, fail to provide access to this level of welfare. If so, then justice—as the libertarian understands it—demands that the state act to correct the distribution of welfare generated by the spontaneous play of market forces. Specifically, the state must compensate anyone who, due to the existing allocation of private property rights in external resources, cannot otherwise achieve Wi. According to at least one influential libertarian philosopher, Robert Nozick, our basic rights thus include not only our rights of self-ownership, but this right to welfare as well.