"Utilitarianism" is a fundamental treatise by the English philosopher John Stuart Mill. In his book, he discusses the principle of utilitarianism, which is that actions are morally right to the extent that they bring about the greatest general happiness for the greatest number of people. The author argues that actions should be judged by their impact on the common good, not by compliance with certain rules or permitted limits. This book not only opened a new perspective on morality, but also influenced many areas of social life, including politics and ethics. The book "Utilitarianism" remains a relevant and intellectually fascinating reader's journey into the world of philosophical reflections on the nature of morality.