Book excerpt: Do moral facts exist? What would they be like if they did? What does it mean to say that a moral claim is true? What is the link between moral judgement and motivation? Can we know whether something is right and wrong? Is morality a fiction? Metaethics: An Introduction presents a very clear and engaging survey of the key concepts and positions in what has become one of the most exciting and influential fields of philosophy. Free from technicality and jargon, the book covers the main ideas that have shaped metaethics from the work of G. E. Moore to the latest thinking. Written specifically for beginning students, the book assumes no prior philosophical knowledge. The book highlights ways to avoid common errors, offers hints and tips on learning the subject, includes a glossary of core terms, and provides guidance for further study.