What is the essence of utilitarianism?

Utilitarianism is a consequentialist approach to normative ethics that holds morally right actions are those that promote the most human happiness. Jeremy Bentham, who created his version of the theory in 1829, and John Stuart Mill who made his in 1861 are considered the founders of utilitarianism, though the basic concept predates either of the two philosophers. Utilitarianism remains as one of the more appealing and compelling approaches to normative ethics.

Utilitarianism evaluates any action in terms of the amount of human happiness delivered as the result of the action.