Utilitarianism
The right action is the one that produces the greatest happiness for the greatest number.
Overview
Utilitarianism holds that the morality of an action is determined entirely by its consequences — specifically, by the amount of happiness or well-being it produces. The principle is elegantly egalitarian: everyone's happiness counts equally, and the right thing to do is whatever maximizes total well-being. Bentham developed a 'felicific calculus' to quantify pleasure and pain. Mill refined this by distinguishing higher pleasures (intellectual, aesthetic) from lower pleasures (merely physical), insisting that quality of happiness matters, not just quantity. Later utilitarians like Peter Singer extended the principle to include animal suffering, while rule utilitarians argued that we should follow rules that generally maximize happiness rather than calculating consequences case by case.
Origins
Utilitarianism emerged in 18th-19th century Britain as a reform movement. Bentham, appalled by the irrationality and cruelty of English law, proposed that all legislation should be judged by a single standard: does it increase or decrease the total happiness of those affected? This principle drove campaigns to reform prisons, expand voting rights, decriminalize homosexuality, and protect animal welfare. Mill extended utilitarianism into a moral philosophy compatible with individual liberty and justice. Today, utilitarian reasoning underlies cost-benefit analysis in public policy, the effective altruism movement, and much of applied ethics.
Key Thinkers (3)
Jeremy Bentham
1748 CE – 1832 CE
The greatest happiness of the greatest number is the measure of right and wrong.
John Stuart Mill
1806 CE – 1873 CE
Actions are right insofar as they produce the greatest happiness for the greatest number.
Peter Singer
1946 CE – Present
If it is in our power to prevent suffering without sacrificing anything of comparable moral importance, we ought to do it.