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Ideas

Results or rules in ethics

Is an act right because of what it leads to, or are some acts always required or forbidden, whatever happens? The two best-known answers are consequentialism and deontology.

What it is

When we ask whether an act is right, two kinds of answer come up again and again. One looks forward and asks what the act will bring about. The other looks at the act itself and asks whether it breaks a promise, uses a person, or crosses a line that should never be crossed. Philosophers call the first kind consequentialism and the second deontology, from the Greek word for duty.

Most people use both ways of thinking in daily life. The disagreement shows up when they pull apart, for example when a lie would do a great deal of good.

The main views

  • Consequentialism. The right act is the one with the best overall results. Versions differ about what counts as good, such as happiness or freedom. Utilitarianism is the best-known version.
  • Deontology. Right and wrong depend on more than results: on duties, rights and norms. Some acts are forbidden whatever they lead to. Kant is the central thinker here.

An example

Suppose a doctor could save five patients by taking the organs of one healthy visitor, who would never be missed. If only results count, the numbers favour doing it. Almost everyone feels there is something deeply wrong with it, and that is the kind of reaction deontology tries to explain: the visitor has rights, and you may not use a person like that, even for a good end.

Why people still disagree

  • Consequentialism can seem to allow too much. It appears to permit harming one person if that helps many, and critics say it does not take rights and fairness seriously enough.
  • It can also demand too much. If every act must make the world as good as possible, most of your time and money should go to strangers in great need, and your own family and friends get very little special weight.
  • Rules can seem too rigid. What if two duties clash? And should a rule hold even when keeping it leads to a catastrophe? Some deontologists say the rules give way when the stakes get very high, but it is hard to say where the line falls.
  • Both can be mixed. Many thinkers hold that rights and duties set limits, and results decide within them.

Written by epchē in our own words, and checked against independent sources on 8 October 2026. The sources are listed below.

Philosophies that answer it

Where each philosophy leans on this question, from the same positions the walk uses.

Results

Duties and rules

Sources we used

Where do you stand? Take the walk

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