The paper, based upon the keynote delivered at the 13th Annual Conference of the Cambridge International Law Journal, reflects upon the tensions in modern public international law, with a particular focus on the vocabulary of international law and settlement of international disputes. First, generalist vocabulary is shown to be both stable in many key respects regarding sources and actors, and, perhaps less obviously, subject to re-evaluation in others, illustrated by reference to the recent work of the International Law Commission. Second, although tension between generalist and specialist elements of international dispute settlement is not unusual, it is suggested that recent developments push simultaneously in both the generalist and specialist directions. It remains to be seen how well the international legal order can withstand such pressures. The paper overall calls for caution, mostly against understating the flexibility of international law in tackling unseen-before challenges but also against complacency that misses the strain that accumulation of commonplace institutions may place upon underlying systemic assumptions.
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