John Locke’s political theory has been the subject of many detailed treatments by philosophers and political scientists. But The Lockean Theory of Rights is the first systematic, full-length study of Locke’s theory of rights and of its potential for making genuine contributions to contemporary debates about rights and their place in political philosophy. Given that the rights of persons are the central moral concept at work in Locke’s and Lockean political philosophy, such a study is long overdue.