Book excerpt: John Rawls is widely regarded as one of the most influential philosophers of the twentieth century, and his work has permanently shaped the nature and terms of moral and political philosophy, deploying a robust and specialized vocabulary that reaches beyond philosophy to political science, economics, sociology, and law. This volume is a complete and accessible guide to Rawls' vocabulary, with over 200 alphabetical encyclopaedic entries written by the world's leading Rawls scholars. From 'basic structure' to 'burdened society', from 'Sidgwick' to 'strains of commitment', and from 'Nash point' to 'natural duties', the volume covers the entirety of Rawls' central ideas and terminology, with illuminating detail and careful cross-referencing. It will be an essential resource for students and scholars of Rawls, as well as for other readers in political philosophy, ethics, political science, sociology, international relations and law.