When John Bellinger of Arnold & Porter was the legal adviser to the State Department in the administration of George W. Bush, the Justice Department filed about a dozen amicus briefs addressing the Alien Tort Statute, a 1789 law that has become a modern vehicle for international human rights litigation. Bellinger told me on Thursday that he signed every one. When foreign nationals use the ATS to bring cases in U.S. courts for conduct that took place overseas, foreign policy is implicated, and the State Department wants a voice. That’s why Bellinger believes it’s so significant that when the Justice Department filed its new amicus brief in the reformulated Kiobel v. Royal Dutch Petroleum case at the U.S. Supreme Court, State Department legal adviser Harold Koh did not sign it.