Our moderator's questions begin with “in what sense is international law and in what sense isn't it universal?” and continue with whether international law may be “different in different places” and what the implications of such differences may be. I am here to defend the “universalist” perspective, as the immediate past president of the American Society of International Law and before that, editor-in-chief of the American Journal of International Law. Though both the Society and the Journal have “American” in their titles and our geographic headquarters is in the United States, the Society's mission statement commits us to pursue “a just world under law,” which I interpret as a global vision for a universal system of international law.