Ali Khamenei is in his late eighties. Iranian succession planning is opaque by design but has been visibly active for several years. Whoever follows him inherits a maritime posture built around three decades of Khamenei’s particular preferences: aggressive enough to extract concessions, restrained enough to avoid full war. That equilibrium is personal. It does not survive the man.

The two leading succession scenarios point in different directions. A consolidation candidate from the IRGC orbit, the kind of figure who would emerge if the Guard’s institutional weight wins out, treats the Hormuz card more aggressively. The IRGC Navy’s leadership has spent forty years arguing internally that Iran’s deterrent value is underused. A Supreme Leader drawn from that worldview reduces the threshold for harassment operations and increases the frequency of incidents in the Gulf. Markets price this as a tail risk that gets fatter.

The Supreme Leader of the Islamic Republic of Iran is eighty-five years old. His health has been the subject of sustained speculation for years, with periodic reports of serious illness that the Iranian government neither confirms nor adequately denies. The succession question is not speculative. It is operational. The individuals and factions positioning for post-Khamenei influence are doing so now, and their relative strength when the transition occurs will determine whether the Islamic Republic emerges from succession in a more confrontational or more accommodating posture toward the outside world, and toward Hormuz specifically.

The strategic logic of Iran’s Hormuz threat rests on the assumption that the cost of closure to the outside world exceeds the cost of closure to Iran. This assumption is correct in relative terms and misleading in absolute terms. Iran would suffer severely from a Hormuz closure that it initiated. Its oil exports, its import supply chain, and its remaining international financial connections all depend on the strait remaining open. The question is whether the political leadership in Tehran would initiate a closure despite these costs, and under what conditions the answer would be yes. The Iranian domestic economy is the ledger that answers that question.