stylistic:tone
Chapters

Mill separated his explanation of Utilitarianism into five different sections:

In the General Remarks portion of his essay, he speaks how next to no progress has been made when it comes to judging what is right and what is wrong of morality and if there is such a thing as moral instinct (which he argues that there may not be). However, he agrees that in general "Our moral faculty, according to all those of its interpreters who are entitled to the name of thinkers, supplies us only with the general principles of moral judgments."

In What Utilitarianism Is, he focuses no longer on background information but utilitarianism itself. He quotes utilitarianism as "the greatest happiness principle", defining this theory by saying that pleasure and no pain are the only inherently good things in the world and expands on it by saying that "actions are right in proportion as they tend to promote happiness, wrong as they tend to produce the reverse of happiness. By happiness is intended pleasure, and the absence of pain; by unhappiness, pain, and the privation of pleasure." He views it not as an animalistic concept because he sees seeking out pleasure as a way of using our higher facilities. He also says in this chapter that the happiness principle is based not exclusively on the individual but mainly on the community.

Mill also defends the idea of a "strong utilitarian conscience (i.e. a strong feeling of obligation to the general happiness)". He argued that humans have a desire to be happy and that that desire causes us to want to be in unity with other humans. This causes us to care about the happiness of others, as well as the happiness of complete strangers. But this desire also causes us to experience pain when we perceive harm to other people. He believes in internal sanctions that make us experience guilt and appropriate our actions. These internal sanctions make us want to do good because we do not want to feel guilty for our actions. Happiness is our ultimate end because it is our duty. He argues that we do not need to be constantly motivated by the concern of people's happiness because most of the actions done by people are done out of good intention, and the good of the world is made up of the good of the people.

In Mill's fourth chapter, Of What Sort of Proof the Principle of Utility is Susceptible, he speaks of what proofs of Utility are affected. He starts this chapter off by saying that all of his claims cannot be backed up by reasoning. He claims that the only proof that something brings one pleasure is if someone finds it pleasurable. Next, he talks about how morality is the basic way to achieve happiness. He also discusses in this chapter that utilitarianism is beneficial for virtue. He says that "it maintains not only that virtue is to be desired, but that it is to be desired disinterestedly, for itself." In his final chapter he looks at the connection between utilitarianism and justice. He contemplates the question of whether justice is something distinct from utility or not. He reasons this question in several different ways and finally comes to the conclusion that in certain cases justice is essential for utility, but in others, social duty is far more important than justice. Mill believes that "justice must give way to some other moral principle, but that what is just in ordinary cases is, by reason of that other principle, not just in the particular case."

The qualitative account of happiness that Mill advocates thus sheds light on his account presented in On Liberty. As he suggests in that text, utility is to be conceived in relation to humanity "as a progressive being", which includes the development and exercise of rational capacities as we strive to achieve a "higher mode of existence". The rejection of censorship and paternalism is intended to provide the necessary social conditions for the achievement of knowledge and the greatest ability for the greatest number to develop and exercise their deliberative and rational capacities.

Mill redefines the definition of happiness as "the ultimate end, for the sake of which all other things are desirable (whether we are considering our own good or that of other people) is an existence as free as possible from pain and as rich as possible in enjoyments." He firmly believed that moral rules and obligations could be referenced to promoting happiness, which connects to having a noble character. While Mill is not a standard act utilitarian or rule utilitarian, he is a minimizing utilitarian, which "affirms that it would be desirable to maximize happiness for the greatest number, but not that we are morally required to do so."