Infrastructure remains undertheorized in international relations scholarship despite its profound political consequences. Economists treat it as neutral scaffolding, the technical foundation upon which markets function. Political scientists often overlook it entirely, focusing instead on military capability, diplomatic rhetoric, or financial flows. Yet infrastructure, including ports, railways, pipelines, and grids, ranks among the most durable and politically consequential instruments of statecraft precisely because it resists reversal. A port carved into a coastline cannot be uprooted. A railway corridor reconfigures spatial economies for generations. A power plant embeds energy dependence into the rhythms of daily governance. Once such systems are built, political choices narrow. Disengagement becomes costly, and alignment becomes structural.