John Stuart Mill was the leading British philosopher of the 19th century and his famous essay Utilitarianism is the most influential statement of the philosophy of utilitarianism.Henry West has written the most up-to-date and user-friendly introduction to utilitarianism available. The book serves as both a commentary to and interpretation of the text. This book is primarily intended as a textbook for students in philosophy assigned to read Utilitarianism but it should also prove helpful to students and professionals in other fields such as political science, history and economics.