An Introduction to Utilitarianism: From Theory to Practice is a state-of-the-art text, simultaneously accessible to introductory students and informative for more advanced readers. Two key features set it apart. First, its comprehensive coverage of the arguments for and against utilitarianism is unparalleled. Second, it takes seriously the practical implications of utilitarianism for how we should live, with a particular emphasis on utilitarianism's impartial beneficence and its focus on effectiveness. Guided by the conviction that practical ethics is more about how best to use our limited time and resources than which victims to hit with trolleys in thought experiments, its practical upshots should prove amenable to utilitarians and non-utilitarians alike.