Abstract:
This article evaluates the 2026 war on Iran on two levels. First, on its own stated terms, where each pillar of the strategy that has been offered to justify it, decapitating the leadership, dividing the elite, strangling the economy by blockading the Strait of Hormuz, and assembling a containment coalition, can be measured against the documented outcome and found to have failed, culminating in the June 2026 deal in which the United States agreed to lift its own blockade and reopen the strait as a concession to end a war it could not win. Second, and more lastingly, on the precedent it establishes, because even had the strategy succeeded it would normalize attacking a state during negotiations, killing its leaders, blockading its waters, and funding its internal fracture, as ordinary tools of policy. The article argues that this conduct collides with the prohibition on the use of force and the principle of non-intervention at the foundation of the post-1945 order, and that a precedent is never a one-way instrument. Every justification invented against Iran becomes available to any state with the power to use it, and rules dismantled to defeat an enemy do not reassemble once he is gone.
Main Article:
There are two ways to judge a war. The first is whether it achieved the aims its architects set for it. The second, less often asked and far more important, is what it permits everyone else to do afterward. A war is not only an event. It is a precedent, a demonstration to every other state of what may now be done and survived. Judged the first way, the 2026 war on Iran has failed. Judged the second way, it has done something worse than fail. It has succeeded in establishing a precedent that the powers who set it will one day regret handing to the world.
Begin with the defense of the war on its own terms, because a sophisticated one has emerged, and it deserves to be met directly.
The argument runs like this. The war was a modern siege, conducted with patience and intelligence. Decapitate the leadership to paralyse the state. Divide the surviving elite against itself. Strangle the economy by blockading the Strait of Hormuz, through which Iranian oil must pass. Assemble a coalition of regional states to contain Iran while the pressure does its work. And then wait for the regime to collapse from within. Described this way, in the cool language of strategy, it sounds like statecraft. Measured against what actually happened, every pillar of it has fallen.
Take the siege of Hormuz first, since it was meant to be the heart of the strategy.
The blockade was meant to strangle Iran into submission. It ended the opposite way. In June 2026, the United States agreed to lift its naval blockade and reopen the Strait of Hormuz as part of the deal to end the war. [6] The instrument of strangulation was withdrawn, not by the victim, but by the besieger, as the price of getting out. A siege that concludes with the besieging party removing its own blockade has not strangled anyone. It has been abandoned. The strait that was closed to break Iran was reopened to release the United States from a war it had found no way to win.
Take the decapitation next, the most extreme element of the strategy and the most revealing.
On 28 February 2026, in a joint operation, the United States and Israel killed the Supreme Leader of Iran, Ali Khamenei, along with more than forty senior officials, in what legal scholars noted was the first time either state had directly killed a sitting head of state. [1] The theory was that removing the leadership would paralyse the state. The result refuted the theory. Iran installed a successor within a day, continued to fight for months, and did not collapse. And the decapitation carried a second cost that the strategy did not anticipate. Across the wider confrontation, the figures killed have repeatedly included precisely those associated with negotiation and with the diplomatic track, the people empowered to make a deal. [2] When a war kills the negotiators, it does not produce a faster settlement. It produces a longer war, because the people who could have ended it are dead. The deal came in the end, but only after surviving officials could be brought to the table by outside mediators, not because the killing had hastened it.
Take the containment coalition, the third pillar, which was meant to isolate Iran behind a wall of its neighbours.
The wall did not rise. Saudi Arabia declined to join the war, resisted pressure to normalize relations with Israel as the price of alignment, and pursued its own de-escalation with Iran. The coalition of Gulf states and Israel arrayed against Tehran existed more in presentation than in fact. The diplomacy that actually ended the war ran not through a maximalist containment bloc but through mediators, Pakistan, Türkiye, and Gulf states, who declined the maximalist framing altogether and worked to halt the fighting rather than to prolong it toward collapse. And the promised regime change, once predicted as imminent and now quietly deferred to a later year, is the same forecast that was made about another country in 2003. The region remembers how that prediction aged.
So on its own terms the strategy has failed at every pillar. But this is the smaller half of the argument, and the half that will matter least in the long run.
Here is the larger half. Suppose, for the sake of argument, that every pillar had succeeded. Suppose the decapitation had paralysed Iran, the siege had strangled it, the coalition had formed, and the regime had fallen. Even in that imagined success, the strategy would have established something the world cannot afford, because it openly proposes, as legitimate and repeatable tools of policy, the killing of a sovereign state leadership, the blockading of its waters, and the funding of its internal fracture. The question is not only whether these tools worked. It is whether a world in which they are normal is a world any state, including the ones now using them, can live in.
To see why not, look at the order these acts collide with.
The framework built after 1945 rests on a small number of load-bearing prohibitions. The United Nations Charter, in Article 2(4), requires all states to refrain from the threat or use of force against the territorial integrity or political independence of any other state, permitting force only in self-defence against an armed attack or when authorized by the Security Council. [3] Alongside it stands the principle of non-intervention, the rule that no state may interfere, directly or indirectly, in the internal affairs of another, a principle the International Court of Justice affirmed as customary law in its 1986 judgment against the United States in the Nicaragua case. [4] The killing of a state official outside an armed conflict, by the assessment of international lawyers, will almost always violate the prohibition on the use of force, the sovereignty of the targeted state, and international human rights law at once. [5] These are not technicalities. They are the rules that make a society of states possible rather than a war of all against all.
There is a reason these particular prohibitions exist, and the reason is structural, not sentimental.
It is difficult to imagine how a system of states could function if national leaders were free to order one another deaths. The whole edifice of diplomacy, of treaties, of the daily business between governments, assumes that the people conducting it will not be killed for conducting it. The norm against attacking the seat of another state is what allows states to deal with one another at all. Strip it away and every negotiation becomes a potential trap, every summit a risk, every diplomat a target. The prohibition is load-bearing. Remove it and the structure it holds up comes down, not only for the state that removed it, but for everyone living in the building.
And this is the principle the architects of the siege strategy will not state plainly, because to state it is to see the trap they are setting for themselves.
A precedent is not a one-way instrument. It does not stay in the hands of the state that first uses it. Every justification invented to make the killing of Iran leadership lawful, every argument that a blockade is self-defence, that funding a separatist militia is legitimate pressure, that attacking a state during negotiations is acceptable, becomes a justification available to every other state with the power to invoke it. The legal arguments built to dismantle one enemy do not dissolve when that enemy falls. They remain, lying on the ground, for the next power to pick up, and the next, including powers that may one day turn them against their authors. You cannot abolish a rule for your enemy alone. You abolish it for the world, yourself included.
This did not begin with Iran, and that is what makes the precedent so dangerous, because it has been built incrementally and in plain sight.
The hollowing of the post-1945 order has been visible for some time, most starkly in Gaza, where the bombing of hospitals and schools, the documented abuse of detainees, and the promotion rather than prosecution of those responsible have steadily normalized conduct the order was built to forbid. The war on Iran takes the same logic and applies it from a stateless population to a sovereign state of some ninety million people. Each step makes the next one easier. Each violation that draws no consequence becomes the baseline from which the following violation begins. This is how an order erodes, not in a single dramatic collapse, but in a sequence of permitted exceptions, each justified as unique, until the exceptions are the rule and the rule is the memory.
So return to the two ways of judging a war, and apply them both to this one.
On its own terms, the war on Iran failed. The siege was lifted by the besieger, the decapitation did not collapse the state, the coalition did not form, and the regime change has been postponed into the same fog that swallowed the promises of 2003. That failure is real, and it should be recorded. But the deeper judgment is the second one. Even in failure, the war has helped to establish that a powerful state may attack another during negotiations, kill its leaders, blockade its waters, fund its fracture, and call all of it self-defence. The order that was built to prohibit exactly this was the one the West claimed to lead and defend. It is being dismantled by its own custodians, who imagine the rules they break against the weak will still protect them when they need them.
A legal order that applies only to those too weak to break it is not a legal order. It is the absence of one, formalized.
That is the precedent the siege has set, and it will outlive the war that set it. The buildings the missiles struck can be rebuilt. The rule that states do not kill one another leaders and dismember one another territories, once broken and seen to be broken without consequence, is far harder to restore, because every state has now watched what may be done and survived. Violence produces more violence, not as a moral slogan but as a mechanism, each breach licensing the next. The war on Iran did not defeat Iran. It defeated something larger and harder to replace, which is the shared fiction, useful and even civilising, that there were rules, and that they applied to everyone. The question that remains is the one its architects are least prepared to answer. What kind of world is left when the powerful have proven, in front of everyone, that the law was only ever for the weak.
References:
Verfassungsblog. "Is the International Norm Against Assassination Dead?" verfassungsblog.de, March 2, 2026, on the joint United States and Israeli operation of February 28, 2026 that killed the Supreme Leader of Iran, described as the first time either state had directly killed a sitting head of state; Verfassungsblog, "Does International Law Prohibit the Assassination of State Leaders?" March 16, 2026, on the February 28 announcement and the March 4 threat against the successor.
Common Dreams. "Israeli Attack Kills Top Iranian Nuclear Negotiator." commondreams.org, June 16, 2025, on the pattern of Israeli strikes killing Iranian figures associated with the nuclear negotiation track at moments of diplomatic progress, a pattern observers described as designed to undercut a diplomatic agreement. Noted here as a documented pattern across the wider confrontation rather than a single decisive event.
Charter of the United Nations, Article 2(4), 1945, on the prohibition of the threat or use of force against the territorial integrity or political independence of any state, with exceptions for self-defence and Security Council authorization.
International Court of Justice. Military and Paramilitary Activities in and against Nicaragua (Nicaragua v. United States of America), Judgment of June 27, 1986, on the affirmation of the customary principle of non-intervention and the rules on the use of force, necessity, and proportionality.
Verfassungsblog, March 2, 2026, on the assessment that the killing of a state official outside an armed conflict will almost invariably violate the prohibition on the use of force, state sovereignty, and international human rights law; The Conversation, "Assassination Is Always Unlawful," August 8, 2025, on the Charter framework and the International Court of Justice requirements of necessity and proportionality.
Time. "Trump Says US and Iran Reach Deal to End War." time.com, June 14, 2026, on the agreement to end the war, including the lifting of the United States naval blockade and the reopening of the Strait of Hormuz; CBC News, "Pakistan's PM Says US, Iran Have Reached a Peace Deal," June 14, 2026, on the mediating role of Pakistan and others.