When Deterrence Dies: A Game-Theoretic Reckoning with the Iran-Israel-U.S. War and What It Means for the Global South

On February 28, 2026, the United States and Israel launched Operation Epic Fury. What had been a stable, if brutal, deterrence equilibrium became something else entirely: a war of attrition with no off-ramp. A mathematician applies game theory to the wreckage.

There is a moment in every conflict when the game changes — not merely in degree, but in kind. Thomas Schelling, who shared the 2005 Nobel Prize in Economics with Robert Aumann for his work on game theory, remains the most lucid cartographer of how nations threaten and bargain at the edge of catastrophe. He called it the point at which the “threat that leaves something to chance” ceases to function. That point arrived on February 28, 2026, when the United States and Israel launched Operation Epic Fury, assassinating Supreme Leader Ali Khamenei in the opening salvo and committing themselves to a war without a defined terminal condition. What had been a stable, if brutal, deterrence equilibrium — a game with multiple possible outcomes, including peace — became something else entirely: a war of attrition with no off-ramp.

As a mathematician, I am drawn to the structural properties of situations. The Iran-Israel-U.S. confrontation is one of the most complex strategic environments of the post-Cold War era, and game theory — the mathematics of interdependent decisions — offers genuine analytical purchase on why we arrived here and what, if anything, can end it. This essay is an attempt to think clearly about a situation in which clarity has become a casualty of war.

Until February 28, the confrontation between Iran, Israel, and the United States was best understood as a Bayesian game with incomplete information — a three-player strategic interaction in which each party held private knowledge about its own resolve, its domestic constraints, and the precise location of its red lines. The equilibrium that emerged from decades of this game was not peace; it was armed coexistence, sustained by mutual recognition that the payoffs from full-scale war were catastrophic for all parties.

Iran’s nuclear program was not primarily a military instrument. It was, in Schelling’s terms, a commitment device — a set of costly, difficult-to-reverse investments that made Iran’s threat to escalate credible without requiring Iran to actually cross the threshold. By approaching nuclear capability without achieving it, Iran secured decades of geopolitical relevance, sanctions-negotiating leverage, and regional influence. The nuclear threshold functioned as what Schelling called a focal point: a bright line that coordinated the expectations of all parties. Iran not crossing it preserved the deterrence equilibrium; crossing it would trigger a qualitative shift to a new game with entirely different payoffs.

Israel’s calculus was governed by what strategic analysts call the shrinking pie problem. Each year Iran spent enriching uranium, hardening its facilities, and dispersing its nuclear infrastructure, the cost of effective military interdiction rose while the window for it narrowed. Israel’s covert operations — Stuxnet, the targeted assassination of nuclear scientists, strikes on weapons convoys transiting Syria — were rational responses to this dynamic: costly enough to convey genuine capability and intent, limited enough to avoid triggering the full-scale conflict Israel could not sustain alone.

The United States occupied the role of extended deterrer, simultaneously constraining Israel’s unilateralism and signaling to Iran that American security commitments to the region remained operative. But this created a classic principal-agent problem: Israel and the U.S. shared the goal of preventing Iranian nuclearization but diverged sharply on risk tolerance and the value of diplomatic off-ramps. Iran exploited this tension skillfully, reading American domestic political cycles — lame-duck presidencies, election-year restraint, post-withdrawal fatigue — as windows of reduced enforcement.

The stability this produced was real but fragile. It was sustained not by trust or agreement, but by the shared recognition that the status quo was preferable to war for all three primary players. Schelling’s deepest insight applies here: the threat that leaves something to chance is more credible than a fully determinate commitment. The Iran-Israel-U.S. confrontation was stable precisely because no party could be certain what the others would do — and that uncertainty was the deterrent.

II. The Phase Transition — February 28 and the Destruction of the Game

Operation Epic Fury did not escalate the existing game. It ended it and replaced it with a different one. The distinction matters enormously.

The 2025 Twelve-Day War — in which Israel struck Iran’s nuclear and military facilities, the U.S. bombed three Iranian nuclear sites, and a US- and Qatar-brokered ceasefire was reached within two weeks — was a brutal but structurally coherent operation. It had defined objectives, verifiable endpoints, and intact negotiating counterparts. The scope of the 2025 strikes, while devastating, left room for negotiations precisely because both sides retained their institutional capacity to make and enforce bargains. Supreme Leader Khamenei was alive. Iran’s leadership was shaken but coherent. Mediators could convene the parties because there were parties to convene.

The February 2026 operation shattered each of these preconditions. The opening salvo killed Khamenei. The stated objective shifted from disarmament to regime change — a goal with no agreed terminal condition, no moment at which a weakened Iran can comply and receive a ceasefire in return. In bargaining theory, you require a counterpart who can make binding commitments. As President Trump himself acknowledged with grim candor on March 3, 2026: “Most of the people we had in mind are dead. Now, we have another group. They may be dead also, based on reports. So I guess you have a third wave coming in. Pretty sure we’re not going to know anybody.”

This is the decapitation paradox: the military logic of eliminating an adversary’s command structure is seductive because it appears to accelerate victory. The strategic logic is frequently the opposite. When you destroy the institutional capacity of an adversary to calculate, to communicate, and to commit — you remove the very mechanism through which the war could end. Schelling understood this. It is why he always argued that effective coercion requires leaving the adversary a way out that they can take.

The metastasis of the conflict is the predictable structural consequence. Where the 2025 war was largely confined to Iran and specific U.S. assets, the 2026 war has spread rapidly. Iranian missile and drone attacks struck U.S. military bases across Bahrain, Jordan, Kuwait, Qatar, Saudi Arabia, and the UAE, with additional missiles targeting bases in Turkey before being intercepted. Attacks even reached a British Royal Air Force base in Cyprus. Hezbollah, which had observed a fragile ceasefire since late 2024, has re-entered the conflict. The Strait of Hormuz, through which approximately 20 percent of global oil and gas traffic normally transits, has been effectively closed. Oil has surpassed $100 per barrel.

III. The Current Game — Attrition with No Off-Ramp

The signatory problem. Every ceasefire requires parties who can make and enforce commitments. Iran’s new Supreme Leader, Mojtaba Khamenei — elevated in the chaotic days following his father’s assassination — lacks the institutional legitimacy and the command authority of his predecessor. The IRGC, regional proxy forces, and clerical factions each retain independent decision-making capacity. Even if Iran’s president Pezeshkian wanted to end the war on available terms, the question of whether any Iranian leader can enforce a ceasefire across all of Iran’s military and paramilitary structures is genuinely open. Iran’s Ministry of Intelligence has reportedly reached out to the CIA through back-channels — while Iran’s foreign minister publicly declares readiness for ground invasion and refuses negotiations. This is not contradiction; it is the signal of a fragmented decision-making system.

The credible commitment problem. Iran has stated its ceasefire conditions publicly: recognition of Iran’s legitimate rights, payment of reparations, and firm international guarantees against future aggression. The last condition is the analytically fatal one. The United States cannot constitutionally bind future administrations to a no-strike pledge. Israel will never accept a permanent constraint on its freedom of action. Iran knows this — which means Iran’s public demands may function less as genuine negotiating positions than as cheap talk, designed to signal defiance while the back-channel search for survivable terms continues.

The Hormuz lever. Once Iran’s nuclear program is degraded and its political leadership decimated, the Strait of Hormuz becomes Iran’s most powerful remaining bargaining chip — a form of economic mutual assured destruction. Iran cannot defeat the United States militarily. But by choking the Strait, Iran imposes costs not merely on the U.S. and Israel but on the entire global economy, enlisting third-party economic pressure — from Gulf states, from Europe, from commodity-dependent developing nations — in service of a ceasefire that military pressure alone could not produce. This is rational strategy for a weaker power, and it is working: the first 100 hours of Operation Epic Fury cost the U.S. approximately $3.7 billion, oil prices have surged, and global food security analysts are warning of cascading disruptions to fertilizer supply chains.

IV. How Does It End? The Endgame Scenarios

There are four structurally plausible terminal conditions for this conflict, each with different game-theoretic logic and different implications for the world beyond the immediate combatants.

Scenario One: Negotiated ceasefire — the most likely near-term outcome. President Trump has stated a four-week operational timetable. Gulf allies, facing Iranian missile strikes on their own soil and economic devastation from Hormuz disruption, are applying intense pressure for de-escalation. Oman and Qatar — strained but still functional as mediators — are working the problem. The pattern from June 2025 is instructive: Iran publicly projected defiance while quietly asking Gulf intermediaries to facilitate terms. The structural incentives point toward the same outcome now, with two critical complications. First, the June 2025 ceasefire held because Khamenei was alive to enforce it on the Iranian side; that enforcement mechanism no longer exists in the same form. Second, the 2025 ceasefire lasted less than nine months before this war began — meaning any ceasefire reached now will be received by both sides as a temporary pause rather than a durable settlement. The game continues; only the intensity modulates.

Scenario Two: Iranian regime transformation. The domestic conditions inside Iran are historically exceptional. The December 2025 protests — the largest since the 1979 revolution, spreading to over 100 cities — were violently suppressed at the cost of thousands of lives. The regime’s legitimacy was already in freefall before the war began. The combination of external military bombardment and internal political crisis creates the conditions for what game theorists call a coordination game among potential defectors inside the Iranian system: IRGC commanders, pragmatic clerics, and technocratic functionaries each face the calculation of whether to hold with the current order or defect toward a negotiated transition. The equilibrium can tip rapidly once a critical mass moves. This is Washington’s apparent hope. History counsels humility: regime change by external military pressure has a poor record of producing the moderate successor governments that policymakers anticipate. Iraq in 2003 is the unavoidable referent.

Scenario Three: Protracted attrition. If ceasefire negotiations fail and regime collapse does not materialize, the conflict settles into a prolonged air campaign — the stronger military power winning every tactical engagement while unable to convert dominance into strategic resolution because the weaker party refuses to surrender and the stronger party refuses to commit ground forces at the scale required for occupation. This is the attritional trap that has consumed American military adventurism in living memory. The question of ground invasion has not been foreclosed, but the Iranian foreign minister’s public statement that Iran is “confident” it could counter a U.S. ground invasion is not mere bravado — it is a signal that Iran has calculated the cost-imposition potential of asymmetric resistance. Afghanistan lasted twenty years.

Scenario Four: Escalation to a regional threshold event. The lowest probability, highest consequence scenario. The stability-instability paradox that previously operated at the nuclear level now operates at the conventional level: because both sides know that all-out escalation produces catastrophic outcomes for all parties, each pursues lower-level attacks with greater latitude. But miscalculation is always possible. A strike on the wrong target, a proxy action that crosses an unannounced red line, an Iranian attempt to weaponize damaged nuclear material — any of these could produce an escalatory dynamic that neither side intended and neither can easily reverse. The fog of war is not a metaphor; it is the lived epistemic condition of armed conflict, and it has a way of making rational actors make decisions that no game-theoretic model would predict.

V. A View from the Global South — What This Means for Guyana and the Caribbean

The consequences of this war are not abstract. They are material, immediate, and distributed with brutal inequity across the international system.

The closure of the Strait of Hormuz is not merely a disruption to global energy markets. For small, commodity-dependent economies across the Global South — including Guyana — it is a direct threat to development trajectories. Fertilizer costs, which are already a persistent vulnerability for agricultural economies across the Caribbean, are implicated directly: nearly 50 percent of global urea and sulfur exports transit the Strait. Food price inflation, already elevated from the aftershocks of the 2022 crisis, will be compounded. For countries where food security is already fragile, this is not a background variable; it is a humanitarian crisis in formation.

Guyana, as a rapidly emerging oil producer, faces a particularly complex set of implications. The short-run effect of a Hormuz closure and oil price surge above $100 per barrel is a revenue windfall — the mathematics of commodity pricing are unsentimentally favorable to producers when supply is constricted. But this is the kind of windfall that historically produces political distortion, Dutch disease dynamics, and governance shortcuts that compound long-run development deficits. The lesson of Venezuela is near; the lesson of Equatorial Guinea is instructive. Guyana’s government must resist the temptation to treat a crisis-induced revenue spike as evidence of structural prosperity.

There is also a deeper geopolitical implication that Caribbean leaders are not yet discussing with sufficient seriousness. The Iran-Israel-U.S. war is accelerating a reconfiguration of global energy security architecture that will have structural consequences for years after any ceasefire. Countries that have been investing in energy diversification — solar, LNG, regional interconnection — will be insulated from the next disruption. Countries that remain structurally dependent on Hormuz-transiting fossil fuels will not. CARICOM’s energy transition agenda, often treated as a climate obligation, is revealed in this moment for what it also is: a national security imperative.

Finally, there is the question of international law and the normative architecture of the post-1945 order. The strikes on Iran — launched without UN Security Council authorization, against a state that was, by Oman’s account on February 27, within days of a potential nuclear breakthrough agreement — represent a significant assault on the rules-based international order that small states depend upon for their survival. The United Kingdom’s Prime Minister Starmer was right to say he does “not believe in regime change from the skies.” Spain was right to refuse the use of its air bases. The silence of most Caribbean governments in the face of a clear violation of the UN Charter’s prohibition on the use of force against the territorial integrity of sovereign states is a failure of diplomatic courage that will be recalled when the shoe is on the other foot.

VI. Schelling’s Last Lesson

Thomas Schelling’s work was recognized with the Nobel Prize for his insight that the most dangerous games are those in which the structure of threats, commitments, and communication shapes outcomes as powerfully as the balance of military force. His central argument was this: the purpose of strategic violence is to change the adversary’s calculation, not to destroy the adversary. When you destroy the adversary’s institutional capacity to calculate, you remove the very mechanism through which the war could end.

Operation Epic Fury was, in this precise sense, a strategic miscalculation of the first order. The 2025 Twelve-Day War had worked — imperfectly, incompletely, but within the logic of coercive bargaining — because it degraded Iranian capability while preserving the counterpart with whom a deal could be made. The 2026 operation, by making regime change its objective and leadership decapitation its opening move, shattered the game it was designed to win.

The most honest game-theoretic prediction about how this ends is as follows: it ends not with decisive victory for either side, but with an exhausted, partial, and unstable ceasefire — structurally similar to the June 2025 outcome, but with Iran weaker, more internally fractured, and considerably less committed to nonproliferation than before. The world will be left with a more radicalized Iranian political landscape, a more dangerous regional environment, a more economically stressed Global South, and a more damaged international legal order. This is a worse equilibrium than the one that existed on February 27.

Mathematics teaches us that not every problem has a clean solution. Some systems are chaotic — sensitive to initial conditions, resistant to prediction beyond short time horizons, capable of generating outcomes that no actor in the system intended or desired. The Iran-Israel-U.S. war has entered that territory. What remains is the hard work of building the diplomatic, economic, and institutional architecture for whatever comes after — work that the Global South must insist upon, demand a voice in, and refuse to treat as the exclusive prerogative of the great powers who created the crisis in the first place.

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Terrence Richard Blackman, Ph.D., is Professor and Chair of the Department of Mathematics at Medgar Evers College, CUNY, and Founder and Publisher of the Guyana Business Journal. He is a former Dr. Martin Luther King, Jr. Visiting Professor of Mathematics at MIT and a former Visitor in the School of Mathematics at the Institute for Advanced Study, Princeton.