 Ronald Dworkin, (Dworkin 1981a, 1981b, 2000) provided one of the most detailed early responses to Rawls’ challenge. In retrospect, Dworkin’s theory is often identified as one of the earliest in the luck egalitarian literature, though Dworkin himself called his theory Resource Egalitarianism. Dworkin presented his key insight (i.e., what distinguishes him from Rawls) in terms of a distinction between ‘ambitions’ and ‘endowments’. Dworkin uses the term ‘ambitions’ to cover the realm of our choices and what results from our choices, such as the choice to work hard, or to spend money on expensive luxuries. His term ‘endowments’ refers to the results of brute luck, or those things over which we have no control, such as one’s genetic inheritance, or unforeseeable bad luck. Dworkin agrees with Rawls that natural inequalities are not distributed according to people’s choices, nor are they justified by reference to some other morally relevant fact about people, so people should not end up worse off as a result of bad luck in the natural lottery. However, Dworkin argues the Difference Principle fails to deliver on this ideal, since its formulation in terms of primary goods fails to recognize that those who are very unlucky, such as the severely ill or disabled, may need considerably greater shares of primary goods than others in order to achieve a reasonable life. Dworkin also argued that just economic distributions should be more responsive than the Difference Principle to the consequences of people’s choices. 