 Another move is to introduce a positive/negative duty distinction within consequentialism. On this view, our (negative) duty is not to make the world worse by actions having bad consequences; lacking is a corresponding (positive) duty to make the world better by actions having good consequences (Bentham 1789 (1948); Quinton 2007). We thus have a consequentialist duty not to kill the one in Transplant or in Fat Man; and there is no counterbalancing duty to save five that overrides this. Yet as with the satisficing move, it is unclear how a consistent consequentialist can motivate this restriction on all-out optimization of the Good.