What could be more basic? The argument that genocide is a domestic matter and. therefore. not a proper subject for treatymaking has been consistently and successfully refuted. The history of treaties ratified by the United States shows a long line of areas having a direct impact on subJects of domestic concern. including the Slavery Convention and the Refugee Protocol Treaty. In fact. the Supreme Court in Geofrey against Riggs (1890) stated that "the treaty power of the United States extends to all proper subjects of negotiations between our government and the governments of other nations." Some critics argue that this treaty exceeds Congress treatymaking authority. Mr.