It is not often that one can find a work tracing the history of a complex idea from Greek philosophers to current debates, but David Boucher has done just that in his magisterial The Limits of Ethics in International Relations.
Jared M Phillip, Journal of International and Global Studies
David Boucher's The Limits of Ethics in International Relations is the result of eleven years hard work. It shows a degree of ambition that is unfortunately rare in the current REF-driven environment, in terms of the period that it covers (from the Ancient Greeks to the present), the length of the book and the level of scholarship. The result is a deeply impressive achievement, containing a wealth of original and nuanced interpretation, especially in the chapters on modern political thought. The Limits of Ethics in International Relations is a remarkable book that develops an ambitious, intelligent, well-informed and original argument on a topic of fundamental contemporary importance.
Kantian Review
David Boucher has written a splendid book. It is to be praised for its breadth as well as for its insight ... This is an important book which advances an important argument that deserves serious attention.
William Bain, International Affairs
To write with authority and clarity on any one of classical and medieval Christian notions of Natural Law, early modern and modern notions of Natural Rights, and the dilemmas of the contemporary Human Rights regime, requires scholarship of a very high order. To write on all three with equal facility, and to knit them together to produce a coherent narrative about the central issues of international ethics is an extraordinary achievement. David Boucher has written a remarkable book, which deserves to be read by every serious scholar of International Relations and Political Theory.
Professor Chris Brown, London School of Economics
All in all, the book is an impressive achievement. In particular, Boucher's nuanced assessment of positions, the scope of his study and his sympathetic treatment of the British Idealists deserve mention.
Georg Cavallar, Political Studies Review