The plan for this volume was simple: to invite some of the best young philosophers working in metaethics to write on topics they found most interesting. The resulting collection represents something of the state of play in this core area of analytic philosophy and provides an indication of the directions that metaethical thinking might take in the future. In addition, the contributions also provide coverage of a suitably broad range of metaethical issues: included here are questions about naturalism and non-naturalism, about expressivism and cognitivism, about the nature of reasons and values, about particularism, aesthetics, moral epistemology, and social normativity. So I hope that this volume not only presents an insight into the distinctive research of individual thinkers, but also stands as an introduction to the contours of the general subject.