Aimed at undergraduates, presupposes little or no familiarity with ethics and is written in a clear and engaging style. It provides students with a sympathetic but critical guide to utilitarianism, explaining its different forms and exploring the debates it has spawned. The book leads students through a number of current issues in contemporary ethics that are connected to controversies over and within utilitarianism. At the same time, it uses utilitarianism to introduce students to ethics as a subject. In these ways, the book is not only a guide to utilitarianism, but also an introduction to some standard problems of ethics and to several important topics in contemporary ethical theory.