Jeremy Bentham was a main utilitarian philosopher of the 18th and 19th centuries

Utilitarianism is the view that the right thing to do is whatever is most useful. It is a philosophical position about ethics. The word "utilitarianism" comes from the word "utility", which means "usefulness". In most forms of utilitarianism, things that increase human well-being or happiness are called useful. This is not limited to the happiness caused by a single action but also includes the happiness of all people involved and all future consequences.