Amal Clooney is one of the legal experts who recommended that the chief prosecutor of the world’s top war crimes court seek arrest warrants for Israeli Prime Minister Benjamin Netanyahu and leaders of the militant Hamas group.

The human rights lawyer and wife of actor George Clooney wrote of her participation in a letter posted Monday on the website of the couple’s Clooney Foundation for Justice. She said she and other experts in international law unanimously agreed to recommend that…