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http://dx.doi.org/10.59704/f9ba51fcf4a4a0cf https://verfassungsblog.de/jus-cogens-and-the-climate-crisis/ Jus Cogens and the Climate Crisis - The Inter-American Court's Landmark Climate Emergency Advisory Opinion and its Jus Cogens Ruling Gehring, Markus eng 2025-07-16 electronic resource text/html ddc:342 Advisory Opinion Climate Crisis Climate Emergency Human Rights IACtHR Ius Cogens jus cogens Verfassungsblog Verfassungsblog--2366-7044 CC BY-SA 4.0 While there are many aspects of the Inter-American Court of Human Rights (IACtHR)’s Advisory Opinion 32/25 (AO-32/25) that are new and groundbreaking, the inclusion of a reflection on jus cogens might have surprised some observers. The legal consequences of the recognition as jus cogens of the obligation not to create irreversible damage to the climate and the global environment are profound. Treaties violating the norm are void, customary international law rules cannot exist, nor does the persistent objector rule apply.