Chokepoints and the cost of cutting off access

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...