" Whetherw happiness be or be not the end to which morality should be referred—that it be referred to an end of some sort, and not left in the dominion of vague feeling or inexplicable internal conviction, that it be made a matter of reason and calculation, and not merely of sentiment, is essential to the very idea of moral philosophy; is, in fact, what renders argument or discussion on moral questions possible. That the morality of actions depends on the consequences which they tend to produce, is the doctrine of rational persons of all schools; that the good or evil of those consequences is measured solely by pleasure or pain, is all of the doctrine of the school of utility, which is peculiar to it. "

― John Stuart Mill , Bentham