In 2022, Ukraine asked SpaceX CEO Elon Musk to activate Starlink coverage around Sevastopol to support an attack on Russia’s Black Sea Fleet. He refused, saying SpaceX would become “explicitly complicit in a major act of war”; he later also cited US sanctions covering Crimea. At the moment that mattered, one private actor had the final say. It exposed a question hidden inside every chokepoint. We usually ask where dependence is concentrated: a strait, mineral, technology, network. But three...