Julian Aguon wore a dark blue suit and garland made of white coconut fronds, brown hibiscus tree bark, and brown cowry shells. Under the arched ceilings and chandeliers of the Peace Palace in The Hague, he stepped to the podium to make his case to the International Court of Justice.
“The right to self-determination is a cornerstone of the international legal order,” Aguon told the 15 judges who make up the court. “Yet climate change, and the conduct responsible for it, has already infringed...