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A moral philosophy that says that what matters is the sum of everyone's welfare, or the "greatest good for the greatest number".

Not to be confused with maximization of utility, or expected utility. If you're a utilitarian, you don't just sum over possible worlds; you sum over people.

More generally, there are other variants of utilitarianism, in particular average utilitarianism that values the maximization of the average utility among a group's members.

See also

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