Jeremy Bentham and John Stuart Mill were both British philosophers born at the same time, Bentham in 1748, Mill in 1806. What they have in common is that they are the main beneficiaries of utilitarianism. Jeremy Bentham is a philosopher, economist, theorist, and one of the major talkers and developers of utilitarianism (Encyclopædia Britannica Online, s. "Jeremy Bentham"). John Stuart Mill is also known for some of what he did.
Utilitarianism is a moral theory, usually resulting from Jeremy Bentham. Bentham and John Stuart Mill are considered to be two major representatives of this theory. Mill wrote after Bentham and adapted some of his ideas to a slightly different version of Utilitarianism. Utilitarianism is the theory of result-basedism, which means that it can only decide whether it is right or wrong based on the outcome of the action or the situation of the action. The theory is relative, there is no rule to judge the situation separately and to impose guidelines on behaviors to be observed in each case. This avoids the main problems confronted by absoluteism such as natural law and Kant Ethics. The right thing brings happiness, and Thomas Carlyle criticizes it as directly criticizing it as "crime only valuable to pig". As a man with reason and wisdom, Carlyle seems to want things from moral theory rather than utilitarianism.
Utilitarianism is the right act in promoting happiness and it is wrong when it promotes misfortune. Jeremy Bentham (1748-1832) is the founder of this theory and John Mill (1706-1873) became the supporter of this theory. John Bentham (1748-1832) argues that pain and happiness not only explains our behavior but also helps us to judge what is good and moral. According to Bentham's hedonism, utilitarianism says that we should always take actions that lead to great joy. In fact, in order to overcome this problem, is there a way to measure happiness so that it can be compared with other behaviors?