Utilitarianism by John Stuart Mill is one of the most influential works in moral philosophy. In this classic text, Mill offers a clear and powerful defense of the ethical theory known as utilitarianism—the idea that the rightness of actions depends on their consequences. According to Mill, actions are right in proportion as they tend to promote happiness, and wrong as they tend to produce the opposite of happiness. Yet Mill refines this principle by distinguishing between higher and lower pleasures, arguing that intellectual and moral pleasures possess a greater value than purely physical ones. Through careful reasoning and philosophical clarity, Utilitarianism addresses fundamental questions about morality, justice, and the relationship between individual well-being and the good of society. The work remains a cornerstone of modern ethical thought and an essential reading for anyone interested in philosophy, politics, and moral reasoning.