Script is rarely a neutral technical choice in this region. Which alphabet a state teaches its children is a declared vector of civilizational allegiance — a public signal of which power it expects to matter for its future. This is what "written sovereignty" means in practice: not legal independence, but the ongoing, contested right to decide whose cultural gravity a nation writes itself into. Three powers are currently making competing claims on that gravity in the post-Soviet Turkic and Persianate world — Turkey, Russia, and Iran — and they are not equally equipped to press the claim.