Britannica Sources used in this answer

Why does Peter Singer believe that an animal’s ability to suffer matters morally?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Three PETA protesters in animal masks and green clothing hold signs reading No Fur at a demonstration against fur in clothing at a shopping district in Seoul, South Korea. — Animal rights A PETA (People for the Ethical Treatment of Animals) demonstration in Seoul, South Korea, against the use of animals for fur in clothing.

Peter Singer’s argument regarding the moral significance of an animal’s ability to suffer is rooted in his utilitarian framework and his principle of equal consideration of interests (PEC).

Singer contends that the capacity to feel pain and experience pleasure is the fundamental condition for having interests at all. Because animals are sentient, they possess an interest in avoiding pain, which Singer argues must be given equal weight to the like interests of humans. He asserts that there is no morally relevant justification for favoring human interests over animal interests based solely on species membership, as species is as arbitrary a criterion as race or sex.123

By prioritizing sentience over characteristics like rationality or language, Singer challenges speciesism—the discriminatory practice of favoring one's own species. He maintains that if a being can suffer, we have a moral obligation to consider that suffering in our decision-making, as it is ethically imperative to minimize pain and promote well-being for all sentient beings.324