The book has three great merits: it deals with a part of the work of Leibniz yet undervalued by commentators (in particular the law and morality); it offers the reader translations of texts ... which are certainly already known but insufficiently explored ... and it offers a novel interpretation of the practical philosophy of Leibniz.

Archives de Philosophie (Bloomsbury translation)

This is a superb and lasting contribution to Leibniz scholarship. No other pioneering work of its kind exhaustively investigates how Leibniz's science of right (ius) lays a deontological foundation for his moral philosophy. No other comparable work shows how the basic principles of this science relate to--and shape--Leibniz's general metaphysics. Johns provides a major reassessment, not only of Leibniz's juridical theory of right, but its place in early modern ethics and political philosophy. This book should be immensely useful to anyone with serious interests in the history of modern moral philosophy, especially from Grotius to Kant and Hegel.

- Jeffrey Edwards, Associate Professor of Philosophy, Stony Brook University, USA,

Christopher Jones has produced a comprehensive and insightful account of Leibniz’s theory of right on the basis of a careful reading of the published sources. All students of Leibniz’s moral, legal, and political philosophy will draw much profit from this informative work.

- Nicholas Rescher, Distinguished University Professor of Philosophy, University of Pittsburgh, USA,