such a procedure might be justified on the grounds that "a general requirement to promote the good would lack the motivational underpinning necessary for genuine moral requirements" and, secondly, that personal independence is necessary for the existence of commitments and close personal relations and that "the value of such commitments yields a positive reason for preserving within moral theory at least some moral independence for the personal point of view." Robert Goodin takes yet another approach and argues that the demandingness objection can be "blunted" by treating utilitarianism as a guide to public policy rather than one of individual morality. He suggests that many of the problems arise under the traditional formulation because the conscientious utilitarian ends up having to make up for the failings of others and so contributing more than their fair share. Gandjour specifically considers market situations and analyses whether individuals who act in markets may produce a utilitarian optimum. He lists several demanding conditions that need to be satisfied: individuals need to display instrumental rationality, markets need to be perfectly competitive, and income and goods need to be redistributed. Harsanyi argues that the objection overlooks the fact that "people attach considerable utility to freedom from unduly burdensome moral obligations ... most people will prefer a society with a more relaxed moral code, and will feel that such a society will achieve a higher level of average utility—even if adoption of such a moral code should lead to some losses in economic and cultural accomplishments (so long as these losses remain within tolerable limits). This means that utilitarianism, if correctly interpreted, will yield a moral code with a standard of acceptable conduct very much below the level of highest moral perfection, leaving plenty of scope for supererogatory actions exceeding this minimum standard." Aggregating utility The objection that "utilitarianism does not take seriously the distinction between persons" came to prominence in 1971 with the publication of John Rawls' A Theory of Justice. The concept is also important in animal rights advocate Richard Ryder's rejection of utilitarianism, in which he talks of the "boundary of the individual", through which neither pain nor pleasure may pass. However, a similar objection was noted in 1970 by Thomas Nagel, who claimed that consequentialism "treats the desires, needs, satisfactions, and dissatisfactions of distinct persons as if they were the desires, etc., of a mass person;" and even earlier by David Gauthier, who wrote