The document discusses utilitarianism as a teleological ethical theory. Utilitarianism focuses only on the consequences of actions and judges actions based on whether they maximize pleasure or happiness. There are two main types: act utilitarianism introduced by Jeremy Bentham, which judges each act individually based on its consequences, and rule utilitarianism, which judges acts based on whether they follow rules that maximize utility if universally followed. John Stuart Mill was a major contributor who argued that utilitarianism is based on the principle that pleasure is good and pain is bad, and the goal of morality is to maximize the happiness of the greatest number of people.