linguistic:voice_change
Negative utilitarianism

In The Open Society and its Enemies (1945), Karl Popper argues that the principle "maximize pleasure" should be replaced by "minimize pain". He believes that "it is not only impossible but very dangerous to attempt to maximize the pleasure or the happiness of the people, since such an attempt must lead to totalitarianism." He claims that:

here is, from the ethical point of view, no symmetry between suffering and happiness, or between pain and pleasure... In my opinion human suffering makes a direct moral appeal, namely, the appeal for help, while there is no similar call to increase the happiness of a man who is doing well anyway. A further criticism of the Utilitarian formula "Maximize pleasure" is that it assumes a continuous pleasure-pain scale that lets us treat degrees of pain as negative degrees of pleasure. But, from the moral point of view, pain cannot be outweighed by pleasure, and especially not one man's pain by another man's pleasure. Instead of the greatest happiness for the greatest number, one should demand, more modestly, the least amount of avoidable suffering for all...

The actual term negative utilitarianism itself was introduced by R. N. Smart as the title to his 1958 reply to Popper in which he argues that the principle would entail seeking the quickest and least painful method of killing the entirety of humanity.

In response to Smart's argument, Simon Knutsson (2019) has argued that classical utilitarianism and similar consequentialist views are roughly equally likely to entail killing the entirety of humanity, as they would seem to imply that one should kill existing beings and replace them with happier beings if possible. Consequently, Knutsson argues:

The world destruction argument is not a reason to reject negative utilitarianism in favour of these other forms of consequentialism, because there are similar arguments against such theories that are at least as persuasive as the world destruction argument is against negative utilitarianism.

Furthermore, Knutsson notes that one could argue that other forms of consequentialism, such as classical utilitarianism, in some cases have less plausible implications than negative utilitarianism, such as in scenarios where classical utilitarianism implies it would be right to kill everyone and replace them in a manner that creates more suffering, but also more well-being such that the sum, on the classical utilitarian calculus, is net positive. Negative utilitarianism, in contrast, would not allow such killing.

Some versions of negative utilitarianism include:

Some see negative utilitarianism as a branch within modern hedonistic utilitarianism, which assigns a higher weight to the avoidance of suffering than to the promotion of happiness. The moral weight of suffering can be increased by using a "compassionate" utilitarian metric, so that the result is the same as in prioritarianism.