The notion of an agent-relative prerogative has traditionally been employed to explain why individuals are permitted to refrain from aiding others when it is costly to do so, rather than the permissibility of harming others (Scheffler 1982: 23). Yet, as critics point out, it is hard to see how the claim that one may attribute one’s own interests extra weight can be restricted in this way (Kagan 1989: 20). Of course, if causing harm is morally worse than allowing harm, this will make it harder to justify harming compared to failing to save. But this does not support the view that prerogatives are relevant to failing to aid, but irrelevant to harming.