Daily Archives: August 17, 2025

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When Custom Binds All States: Reflections on Customary International Law in the ICJ Climate Advisory Opinion

In the triptych of inspiring advisory opinions by international courts and tribunals (see here, here, and here), the third iteration by the International Court of Justice (ICJ) did not disappoint. Its unanimous advisory opinion on climate change constitutes a landmark decision that will be with us for many years. This […]