International law, though formally neutral among regime types, has mainly been a product of liberal democracies since World War II. In light of recent challenges to the liberal international order, this Article asks, what would international law look like in an increasingly authoritarian world? As compared with democratic countries, authoritarians emphasize looser cooperation, negotiated settlements, and rules that reinforce regime survival. This raises the possibility of authoritarian international law, designed to extend authoritarian rule across time and space.