A Way Out
How to End the Iran War This Week and Stop the Next One Forever
Brandon Sergent March 2026
What This Paper Is
This paper is a plan. It is written for anyone who can read it and act on it, or who can hand it to someone who can. It does not assume military rank or government office. It assumes only that the reader can see what is happening and wants it to stop.
A companion paper, Conventional Intercontinental Ballistic Missiles and the Missing Rung, explains the strategic theory behind this plan in technical detail. This paper is the short version. It says what to do, why it works, and how fast it can happen.
The companion paper exists for people who need the proof. This paper is for people who need the plan.
The Problem in Plain Language
The United States attacked Iran. The stated reason was Iran’s nuclear program. The actual military result is that the nuclear program has not been destroyed, American soldiers are dying, the Strait of Hormuz is closed, oil prices are wrecking the global economy, and nobody has a clear way out.
Iran cannot be bombed into giving up. History is unambiguous on this. You cannot destroy a country’s will through air power alone. Iran has proven this over the past weeks by absorbing strikes and continuing to function.
The United States cannot send ground troops. The terrain is mountain. The Iranian military is trained specifically to defend it. Officers who have studied the problem describe the outcome as a bloodbath with no guaranteed victory even after enormous casualties.
The nuclear option is not a real option. Using a nuclear weapon against Iran would not end the conflict. It would trigger a cascade of consequences that every serious analyst agrees would be far worse than the current situation, including the very real possibility of a broader nuclear exchange within years.
So the United States is stuck. It cannot win by continuing. It cannot simply stop without Iran setting terms. Iran currently controls the Strait of Hormuz, which means Iran controls a significant fraction of the world’s oil supply. Iran has no reason to give that up in exchange for a return to a situation where it has no protection against the next American operation.
The war continues because nobody has offered Iran a real alternative to holding the Strait as leverage.
This paper offers one.
Why Wars Start: The Simple Version
Wars between a powerful country and a weaker one start for a simple reason. The powerful country calculates that the cost of attacking is less than the benefit. The weaker country cannot make that calculation come out differently because it does not have anything capable of imposing a cost that the powerful country cannot absorb.
The weaker country has two options. It can accept the attack. Or it can pursue nuclear weapons, because nuclear weapons are the one thing that makes the cost calculation come out differently. North Korea figured this out. Iran figured it out. Every country watching the current conflict is figuring it out right now.
This is not a moral failure. It is rational arithmetic.
The problem is that pushing every threatened country toward nuclear weapons as the only deterrent is the most dangerous possible outcome for everyone. Nuclear weapons have a catastrophic threshold. There is no proportional nuclear response to a conventional attack. The only message a nuclear weapon sends is total destruction. That is not a stable deterrent. It is a catastrophic one.
What is missing is everything in between. A capability that says: if you attack us, we will certainly destroy something you value, proportionally, without killing civilians, without crossing into nuclear territory, and without starting a world war. A capability that makes the cost of attacking us exceed the benefit, without requiring us to threaten the end of civilization to do it.
That capability is a Conventional Intercontinental Ballistic Missile. A regular ICBM with a conventional warhead instead of a nuclear one. Fast enough to reach anywhere. Precise enough to hit a specific building. Powerful enough through physics alone to destroy whatever it hits. No nuclear material. No nuclear threshold. No world-ending escalation. Just an unacceptable certain cost delivered to whoever attacks.
The Concrete and Tungsten Insight
Here is the part that sounds too simple but is not.
An ICBM arriving at its target is traveling at roughly Mach 23. That is twenty-three times the speed of sound. At that speed, the missile does not need explosives to be devastatingly destructive. The physics of the impact alone releases energy equivalent to hundreds of tons of conventional explosive. The kinetic energy at that velocity is the weapon.
This means you can remove the nuclear warhead from an existing ICBM, fill the same space and weight with a solid mass of dense metal, and have a weapon that is more destructive against hardened targets than most conventional bombs, contains zero nuclear material, crosses zero nuclear thresholds, and requires almost no new technology.
Tungsten is the right material. It is extremely dense, approximately eight times denser than concrete. A tungsten mass in the same form and weight as an existing nuclear warhead uses the existing guidance systems, the existing reentry vehicle, and the existing delivery infrastructure without modification. The guidance system does not know or care what the payload is. It tracks its own position. The same avionics work.
This is not a years-long development program. This is a machine shop job. The delivery vehicles already exist. The modification is replacing one heavy object with another of the same weight and shape. The time from decision to operational capability is measured in days to weeks, not years.
This matters because it means the plan described in this paper does not require waiting for new weapons to be built. It requires deciding to use what already exists in a new way.
The False Alarm Problem and Why It Is Solved
The reason conventional ICBMs were never deployed before is that military planners worried about the following scenario. The United States launches an ICBM. Russia or China detects the launch. They cannot immediately tell if the warhead is conventional or nuclear. They have minutes to decide whether to respond with their own nuclear weapons before the missile lands. That compressed decision window with maximum stakes is exactly where catastrophic mistakes happen.
This concern was valid when it was first raised. Detection technology was less capable and the confirmation of a missile’s destination took longer than comfort allowed.
Two things have changed.
First, detection technology is now good enough to determine where a ballistic missile is going within the first few minutes of flight, and often faster. A missile launched from a submarine in the northern Arabian Sea toward Iran is traveling in a direction that does not point at Russia or China. The geometry is physically different. No analysis is required to see that a missile heading toward Tehran is not heading toward Moscow.
Second, you can simply tell them in advance.
If you pick up the phone and call Russia and China before the launch and say exactly the following: in one hour, we are launching one conventionally armed ballistic missile from this submarine at these coordinates toward this specific military target in Iran, the warhead is a solid tungsten mass, here are the technical specifications so your detection systems can confirm this, please acknowledge, then the false alarm problem does not exist. They know what is coming. They know where it is going. They know what it contains. Their detection systems confirm it as described. There is no ambiguity.
This is called pre-notification. It is not a new concept. It is an established mechanism in arms control for exactly this kind of communication. The infrastructure to do it exists right now.
The combination of obvious trajectory geometry and pre-notification reduces the false alarm risk to something manageable. Not zero. But far less than the nuclear escalation risk that the current conflict is already generating.
The Press Release That Changes Everything
The most powerful immediate action available requires no hardware at all.
A government, a coalition, a credible individual with access to a major platform, or any combination of the above, could issue the following statement today:
The technology to end this conflict and prevent the next one already exists. A conventional ICBM, meaning a standard long-range ballistic missile with a dense metal mass instead of a nuclear warhead, provides the deterrence that makes attacking weaker nations unprofitable, without crossing any nuclear threshold. The modification is simple. The delivery vehicles exist. The physics work. We are calling on the United States to declare its intention to develop this capability openly, to share the framework with Russia and China through existing communication channels, and to make it available to nations that need deterrence without nuclear weapons. This ends the arms race toward nuclear proliferation by providing a proportional alternative. It ends the current conflict by giving Iran a legitimate security guarantee it can actually believe. It prevents the next conflict by closing the gap that made this one possible.
That statement, made publicly by anyone credible enough to be heard, starts a debate. The debate itself buys time. Every day of debate is a day the current situation does not escalate further.
The statement is true. The technology works. The modification is straightforward. The strategic logic is sound. Anyone who disputes it has to explain why a country facing existential military attack should not have access to a conventional deterrent, and that explanation will be difficult to make in public without revealing interests that benefit from the current arrangement.
The Japan Problem and Why It Matters
Japan imports most of its oil through the Strait of Hormuz. So does South Korea. So does most of Southeast Asia. The closure of the Strait is not just an American strategic problem or an Iranian power play. It is an economic emergency for dozens of countries that had nothing to do with starting this conflict.
Japan has every practical reason to want this conflict resolved. Japan also has a highly developed aerospace and defense industry, a sophisticated military capability, and a significant interest in regional stability. Japan is not the United States. Japan does not carry the political baggage of being the attacker. Japan could enter this framework as a credible neutral party with real economic skin in the game.
The point extends to every nation that depends on Strait of Hormuz oil supply. Any of them could adopt the CICBM framework. Any of them could offer a conventional deterrence umbrella to Iran or to other threatened states under a transparency and verification regime. Any of them could make the press release above.
The CICBM framework is not American property. It does not require American approval to advocate for. The strategic logic belongs to anyone who understands it. The political cover to advocate for it belongs to anyone with a reason to want stability in the region, which is most of the world.
This is the opening. The conflict has created a global audience with global stakes. That audience does not have to wait for the United States to act. It can apply pressure, offer frameworks, and force a public debate that changes the calculus for everyone involved.
What Russia and China Could Do Right Now
Russia and China have ICBM-class ballistic missile capability. They have submarines. They have existing communication channels to American strategic command. They have every strategic interest in constraining American military unilateralism in the region.
They could, today, issue a joint statement declaring the following: any further conventional military strikes on Iranian territory will result in a declared conventional ballistic missile response against American military bases in the region, launched from submarine positions in the Arabian Sea, pre-notified through existing channels, with conventional payloads, targeting military infrastructure only.
This is not a nuclear threat. It does not cross any nuclear threshold. It is a declaration that they will use existing conventional ICBM-class capability defensively, proportionally, transparently, on behalf of a third party that has been attacked.
The effect on the American cost-benefit calculation is immediate and decisive. The bases in Qatar, Bahrain, Kuwait, and Diego Garcia are now under declared conventional ICBM threat. The entire logistics and strike infrastructure that the current campaign depends on becomes a guaranteed casualty of continuation. The cost side of the calculation changes completely. The conflict becomes unprofitable for the attacker in concrete operational terms, not just diplomatically or economically.
This is not escalation to nuclear war. It is closing the gap that made the attack possible in the first place. It is doing at the international level what artillery does at the conventional land warfare level. It fills the empty space on the escalation ladder with a proportional, credible, conventional response capability that changes the math without ending civilization.
Russia and China have not done this. The reasons why are worth examining. They may be choosing to let the United States exhaust itself. They may be unwilling to take on the political cost of direct confrontation even at the conventional level. They may be calculating that a weakened America serves their interests more than a stable Middle East does. Any of these calculations could change if the framework were made explicit and public enough that not acting became more costly than acting.
What Iran Could Trade
Iran currently holds leverage through the Strait of Hormuz. That leverage is real and Iran is correct to use it. But holding the Strait indefinitely is not a sustainable strategy. It is damaging Iran’s relationships with countries that need the oil, including China and India, which are among Iran’s few remaining economic partners. It is also providing justification for continued American operations.
What Iran needs is not the Strait. What Iran needs is a security guarantee it can believe.
Every previous security guarantee offered to Iran has been worthless. The Nuclear Deal provided sanctions relief in exchange for nuclear program constraints. The United States withdrew from it unilaterally. The lesson Iran drew was correct: agreements with the United States are only as durable as the next election cycle.
A CICBM-based security framework is different because it does not depend on American good faith. If Russia and China have declared a conventional ICBM umbrella over Iran, that umbrella is backed by physical capability that does not require American cooperation to function. The guarantee is credible because it does not ask Iran to trust a party that has already broken its promises.
Iran could trade the Strait opening for a verified conventional deterrence framework. This means: Iran accepts international inspection of its nuclear program and accepts constraints on weapons-grade enrichment. In exchange, Iran receives formal recognition of its right to a conventional CICBM deterrent capability under a transparency and verification regime, backed by a Russian and Chinese umbrella declaration in the interim while that capability is developed.
This is a trade that addresses the actual underlying problem. Iran is not enriching uranium because it wants nuclear weapons for their own sake. Iran is enriching uranium because it is the only deterrent option available. Remove the need for nuclear deterrence by providing a conventional alternative, and the nuclear program negotiation becomes tractable in a way it has never been before.
Ukraine: The Same Logic
Ukraine is a different conflict but the same underlying problem. Russia calculated that the cost of invading was less than the benefit. Ukraine could not make that calculation come out differently because Ukraine did not have a capability that imposed an unacceptable certain cost on Russia.
A Ukraine with declared CICBM capability in 2021, positioned to strike Russian logistics infrastructure and energy distribution networks in response to a large-scale ground invasion, changes the pre-invasion calculation. The invasion may still have happened. It becomes substantially more expensive to start. The cost side of the equation looks different when the defending state can guarantee destruction of specific infrastructure that the attacker values.
This lesson is directly applicable to the next Ukraine. There will be a next Ukraine. There will be another state that a larger power calculates it can absorb at acceptable cost. The CICBM framework changes that calculation permanently for any state that adopts it.
The current Ukraine conflict also illustrates the negotiating leverage point. Ukraine has something to trade in negotiations: a commitment not to develop or deploy CICBM capability within striking distance of Russian territory, in exchange for specific territorial and security guarantees. Currently Ukraine has very little that Russia wants constrained. A declared CICBM program under development is something Russia would want constrained. It creates negotiating space that does not currently exist.
The Genocide Question
The conflict in Gaza is connected to the Iran situation through the same underlying logic. Israel attacks because it calculates the cost is acceptable. The civilians of Gaza pay the cost that Israel’s calculation treats as acceptable. There is no conventional deterrent available to the people of Gaza. There is no mechanism that makes the attack calculation come out differently.
The CICBM framework does not directly solve the Gaza situation. The populations involved do not have states with the industrial base to develop or acquire CICBM capability. The framework’s deterrence mechanism requires a state actor.
What the CICBM framework does is change the regional context. A Middle East in which Iran has a credible conventional deterrent, in which the major powers have declared their interest in regional stability through concrete capability commitments, and in which the United States no longer has uncontested escalation dominance, is a Middle East in which the political conditions for the Gaza situation are harder to maintain. External pressure on Israeli policy increases when the United States is no longer in a position to shield that policy from consequences. The framework does not end the genocide directly. It removes the condition of uncontested American impunity that has allowed it to continue.
The Week-by-Week Plan
This is what the plan actually looks like in time.
Today. Anyone with a platform publishes the argument. Not the technical version. The plain version. The one that says: there is an obvious solution to this conflict that nobody in power is discussing, here is what it is, here is why it works, here is why it is not being done.
The debate starts. The debate itself is the first action. It forces the parties to either engage with the argument or ignore it in public. Ignoring a coherent solution to an active catastrophe in public is politically costly. Engaging with it puts the logic on the table where it can be examined.
This week. Diplomatic back channels from any interested party, Japan, South Korea, India, the EU, anyone with standing, to both Washington and Tehran, proposing the framework. Not demanding. Proposing. Asking whether a conventional deterrence framework under international verification would change the ceasefire calculation.
This week, hardware side. A submarine already positioned in the Arabian Sea. There are American submarines in that ocean right now. Changing the declared purpose of one of them from nuclear deterrence to conventional deterrence demonstration requires a decision, not a procurement program. Load a conventionally modified reentry vehicle. Announce the position publicly. Let every satellite see it. Let every intelligence service confirm the trajectory geometry. The physical backing for the declaration costs nothing beyond the decision to make it.
Within weeks. Formal Russian and Chinese umbrella declaration, if they choose to make it. The declaration is the work of a press conference, not a weapons program. The capability already exists. The decision to declare its defensive use on behalf of a third party under specific conditions is political, not technical.
The ceasefire condition. Iran opens the Strait. The United States stops strikes. Both parties enter a framework negotiation on verified conventional deterrence. The nuclear program constraints become negotiable because the deterrence need is being addressed through a different channel.
This does not require all parties to act in good faith indefinitely. It requires only that the immediate cost-benefit calculation changes enough to stop the current killing while a longer-term framework is negotiated. The ceasefire buys time. The framework buys permanence.
Why This Has Not Already Happened
The honest answer is that the people with the most power to implement this framework are the same people who benefit from the gap that makes the current conflict possible.
The ability to attack non-nuclear states with conventional military force without facing a proportional response is a source of power. It allows enforcement of economic and political arrangements that those states might otherwise resist. It allows military operations that could not survive the cost-benefit calculation if a real deterrent existed on the other side.
The CICBM framework does not just end this conflict. It permanently changes the condition that makes this kind of conflict profitable. Every state that acquires a verified conventional deterrence capability under this framework becomes a state that cannot be attacked with the same calculation that made Iraq, Libya, Afghanistan, and now Iran possible.
That is a large change in the global balance of power. It is a change that benefits most of the world’s population. It is a change that costs the parties who have been benefiting from the current arrangement.
The technical paper explains in detail how the arms control frameworks that should be promoting stability are instead maintaining the gap. The short version is: the absence of conventional ICBM deterrence for regional states is a policy choice that serves specific interests. Those interests are not the interests of the people currently dying.
What You Can Do
If you are a policymaker: propose the framework. You do not need consensus to propose it. You need courage to put it on the table where it can be examined. The argument is sound. Let it be examined.
If you are a journalist: ask the question. Why is there no discussion of conventional ICBM deterrence as a ceasefire framework? Why is the only choice between continuing the war and Iran surrendering its leverage with nothing in exchange? The question has an interesting answer.
If you are a diplomat: make the call. Tehran, Washington, Moscow, Beijing. The framework exists. The phone exists. The question is whether someone is willing to be the person who puts it on the table before more people die.
If you are none of these: share the argument. The debate is the first action. The debate requires the argument to exist in places where decision-makers cannot avoid it. Put it there.
The Summary Version
The current war continues because Iran has no reason to stop. Iran holds the Strait because it is the only leverage that makes a post-war world safe for Iran. Every previous security guarantee has been worthless. Iran needs something that does not depend on trusting its attacker.
A conventional ICBM capability under international verification gives Iran deterrence it can believe in. It does not require nuclear weapons. It does not cross nuclear thresholds. It requires replacing a nuclear warhead with a dense metal mass, which is a machine shop modification of existing hardware.
Russia and China can declare a conventional ICBM umbrella over Iran today. The declaration costs a press conference. The capability already exists. The trajectory geometry ensures it is unambiguously conventional.
Japan, South Korea, and every other oil-dependent nation has standing to demand this framework. The Strait closure is costing them money and security every day it continues.
The debate about this framework, made public and loud enough that it cannot be ignored, changes the political conditions for all parties within days. The hardware to back the declaration up can be assembled in weeks. The ceasefire it enables stops the killing.
The next war is prevented by making the framework permanent. Every state that acquires verified conventional deterrence capability becomes a state that cannot be profitably attacked. The nuclear proliferation race ends when the deterrence need is met by something that does not end civilization.
This is the way out. It is available now. The question is only whether anyone with the ability to act on it will do so before more people die.
This paper is a companion to “Conventional Intercontinental Ballistic Missiles and the Missing Rung: Toward a Doctrine of Sub-Nuclear Prompt Global Deterrence” by Brandon Sergent, which provides the full strategic and technical analysis underlying the framework described here. Readers seeking the detailed argument for why this approach is strategically sound, how the false alarm problem is addressed, and how a verification regime would function are directed to that paper.
Also innovative.
I completely agree with the deterrence argument. As the author so politely pointed out, the (western) policymakers with the power to implement it are the same ones who benefit from the current gap in deterrent power.
What's missing in the analysis is the woo factor. Let's assume that planet earth is a loosh farm, and their are powers, principalities, etc who benefit from the harvest of fearful energy.
Implementing the deterrence equalizer would certainly put a dent in that operation!