When a nation's primary arteries are severed, it discovers what it always knew but never fully tested: that secondary paths exist, but they are not equal. Iran, facing a US maritime blockade of its southern ports, is now pressing into land corridors and northern waterways it long treated as contingencies — routes through Russia, Turkey, Central Asia, and Pakistan that can sustain essential trade but cannot replicate the scale or economics of Persian Gulf shipping. The shift reveals a deeper truth about geography and power: resilience and replacement are not the same ambition, and the cost of s