'[This] book is so much more than a brand-new history of international law in the pre-modern era; it is a new history, it is an extraordinary piece of scholarship … not just a scientific work of the finest quality, but also an amazing literary achievement. … It contains a dazzling amount of knowledge about so much more than international law. It also offers new views on intellectual history, medieval scholasticism, the history of early modern theology, and the history of law, tout court.' Wim Decock, Journal of the History of International Law / Revue d'histoire du droit international (JHIL)