and most patterned principles of distributive justice institute (partial) ownership by others of people and their actions and labor. These principles involve a shift from the classical liberals' notion of self ownership to a notion of (partial) property rights in other people." Nozick then briefly considers Locke's theory of acquisition. After considering some preliminary objections, he "adds an additional bit of complexity" to the structure of the entitlement theory by refining Locke's proviso that "enough and as good" must be left in common for others by one's taking property in an unowned object. Nozick favors a "Lockean proviso" that forbids appropriation when the position of others is thereby worsened. For instance, appropriating the only water hole in a desert and charging monopoly prices would not be legitimate. But in line with his endorsement of the historical principle, this argument does not apply to the medical researcher who discovers a cure for a disease and sells for whatever price he will. Nor does Nozick provide any means or theory whereby abuses of appropriation—acquisition of property when there is not enough and as good in common for others—should be corrected. The Difference Principle Nozick attacks John Rawls's Difference Principle on the ground that the well-off could threaten a lack of social cooperation to the worse-off, just as Rawls implies that the worse-off will be assisted by the well-off for the sake of social cooperation. Nozick asks why the well-off would be obliged, due to their inequality and for the sake of social cooperation, to assist the worse-off and not have the worse-off accept the inequality and benefit the well-off. Furthermore, Rawls's idea regarding morally arbitrary natural endowments comes under fire; Nozick argues that natural advantages that the well-off enjoy do not violate anyone's rights and that, therefore, the well-off have a right to them. He also states that Rawls's proposal that inequalities be geared toward assisting the worse-off is morally arbitrary in itself. Original position Nozick's opinions on historical entitlement ensures that he naturally rejects the Original Position since he argues that in the Original Position individuals will use an end-state principle to determine the outcome, whilst he explicitly states the importance of the historicity of any such decisions (for example punishments and penalties will require historical information). Equality, Envy, Exploitation, Etc. Nozick presses "the major objection" to theories that bestow and enforce positive rights to various things such as equality of