Enlightenment and knowledge · 1789 onward
Utilitarianism
Overview
An act is right when it does the most good for everyone it touches. The hard work is counting well and leaving no one out.
Utilitarianism begins with one demand: judge an act by what it does to the well-being of everyone it touches. Bentham’s rule, as Mill reports it, was to count each person as one and none as more than one. Mill added that pleasures differ in quality, and that it is better to be a human dissatisfied than a pig satisfied. The school turns morality from a question of purity into a question of results.
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Its strength is impartiality. A rule that helps a few at the cost of many has to show why. Its difficulty is that results are hard to count, that some goods and harms resist numbers and that a total can hide a minority who bear a great cost. Critics ask whether it would approve of treating a person as a mere means if the sums came out right.
Modern versions, including Peter Singer’s, press the question outward: if distance does not change the value of a life, what do we owe strangers? The practical habit is to name everyone affected, estimate the good and the harm honestly and then ask whether the answer survives a look at who has been left out.
Where it answers
How should we act?
Do what brings the most well-being to everyone affected, counting each person alike.
Who should govern?
Laws and policies are good when they improve lives overall, and should change when they do not.
What is a life for?
A life goes well when it holds happiness and adds to the happiness of others.
Key terms
- Principle of utility
- The right act is the one that brings the greatest happiness to all affected.
- Hedonic calculus
- Bentham’s method of weighing pleasures and pains by intensity, length and other measures.
- Higher and lower pleasures
- Mill’s view that pleasures of the mind are worth more than mere bodily pleasures.
- Impartiality
- Everyone’s happiness counts equally, including strangers’.
In their words
“It is better to be a human being dissatisfied than a pig satisfied; better to be Socrates dissatisfied than a fool satisfied.”
Further reading
- An Introduction to the Principles of Morals and Legislation · Jeremy Bentham
- Utilitarianism (Mill)
- Practical Ethics · Peter Singer
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Quest2Reason. “Utilitarianism.” https://quest2reason.com/learn/ideas/utilitarianism. Accessed 13 November 2026.