When missiles are flying and drones hit commercial buildings, the conversation usually shifts to “how do we win?” But from the perspective of Geopolitical Moral Theology (GMT), the question isn’t about winning; it’s about whether we should be fighting at all.

Now that the United States is actively engaged in a war with Iran, we have to move past “what if” scenarios and perform a real-time moral audit of the bloodshed. GMT looks at this conflict as a deep moral crisis. It uses the “Just War” framework—refined over centuries by thinkers like St. Thomas Aquinas—to ask if this ongoing violence can be justified in the eyes of God and humanity, or if it has become a moral disaster.

To evaluate a war while it’s happening, we use a strict checklist. For a war to stay “just,” it must have started for the right reasons and must be fought in the right way. This means looking at who authorized it, why we are still in it, and whether the destruction we are seeing is doing more harm than any “good” we hoped to achieve. If an ongoing war fails even one of these tests, GM argues—as Popes Francis and Leo XIV argued—that the only moral path forward is to stop fighting immediately.

The problem of authority in a global world

The first issue is Legitimate Authority. While the President, as Commander-in-Chief, has the legal right under U.S. law to lead this war, GMT asks a bigger question: does he have the moral right in the eyes of the world?

We live in a global neighborhood, and modern Catholic teaching says that acting alone—or in defiance of international agreements—weakens a leader’s moral standing. If this war is being fought unilaterally, without a broad consensus from the international community or in violation of previous peace treaties, it starts to look less like “justice” and more like “bullying.”

A war that ignores the “common good” of the global human family is a war that lacks true moral authority.

Are we defending or just attacking?

Next, we have to look at the Just Cause. Usually, you’re allowed to fight to defend yourself from an actual attack. But now that the war is in full swing, we have to ask: what was the “spark”?

If the U.S. started this war because Iran was actually attacking us, that’s one thing. But if it started as a “preventive” war—hitting them because we were afraid of what they might do in the future—then the entire foundation of the war is morally cracked. GMT is very clear that you cannot start a massive, deadly conflict based on “what-ifs.”

If the war isn’t a response to a real, certain wrong, then every life lost is a life lost for no just reason.

Checking our intentions mid-battle. Even with a reason to fight, the Right Intention must guide every bomb dropped. The only moral goal of war is to bring back a fair and lasting peace. But as we watch the conflict unfold, we have to look at the rhetoric coming from the leaders.

Is the goal to restore order, or is it about “regime change,” revenge, or showing off military dominance? If the war has turned into an attempt to humiliate an enemy or take control of their resources, it has lost its way. A just war doesn’t seek to “crush” a people; it seeks to end a conflict so that everyone can go back to living in safety.

Was this really the last resort?

One of the hardest questions to answer during a war is whether it was truly the Last Resort. GMT forces us to look back at the moments before the first shot. Did we really try every diplomatic tool? Did we exhaust every sanction and every negotiation?

If the U.S. dismantled diplomatic deals (like the 2015 nuclear framework) and chose “maximum pressure” instead of “maximum peace negotiations,” then the war wasn’t a last resort—it was a choice. You cannot claim war is the only option left if you were the one who walked away from the table where peace was being built.

The “price tag” of war (proportionality). Now that the war is active, we can see the real-world consequences, and this is where Proportionality comes in. This rule says the “good” you achieve can’t be smaller than the “bad” you cause.

Look at the Middle East right now: Is the region destabilized? Are oil prices making it impossible for poor families to buy food? Is the fighting spreading into Iraq, Syria, and Lebanon? If the “fix” (the war) is creating a global economic crisis and a regional apocalypse, then the war has failed the proportionality test. A war that burns down the whole neighborhood to put out one fire is not a just war.

The tragedy of civilian lives

We also have to talk about Discrimination, which is the rule that you must protect innocent people. In modern warfare, especially in a country like Iran where military sites are in the middle of crowded cities, “collateral damage” isn’t just a term—it’s a tragedy.

GMT and Catholic Social Teaching insist that civilians have a right to life that must never be violated. If the ongoing military strategy involves bombing urban centers or using weapons that kill indiscriminately, it is a crime against humanity. You cannot “save” a country by killing its people.

Who suffers most? In moral theology, we talk about the Option for the Poor. This means we judge a situation by how it affects the most vulnerable. While the generals and politicians are safe, who is actually suffering? It’s the families in Tehran who can’t get medicine, the migrant workers in the Gulf who are caught in the crossfire, and the poor in every country who are hit by the rising costs of fuel and food.

A war that deepens poverty and displacement across the globe is a war that fails the test of love and justice.

The nuclear nightmare

The war with Iran has a unique danger: the Nuclear Question. We are told the war is meant to stop Iran from getting a nuke, but the reality might be the opposite. A country being attacked by a superpower is more likely to want a “big stick” to defend itself.

If this war makes the world more dangerous by pushing more countries toward nuclear weapons, it is undermining the global common good. Instead of making us safer, the war is making the entire planet a more volatile and dangerous place to live.

The need for prudence and real peace. Finally, we have to ask if this war is Prudent. Prudence is the wisdom to see the world as it really is, not how we want it to be. If this war is turning into another “forever war” with no clear exit and no real plan for what comes next, it is a failure of leadership.

The goal of war is supposed to be tranquillitas ordinis—the tranquility of order. If the ongoing fighting is only creating more chaos, more extremism, and more hatred, it isn’t serving its purpose.

Looking at the war through the lens of GMT, the conclusion is somber. If the war started without a direct attack, if it bypassed diplomacy, and if it is now causing regional chaos and civilian death, it cannot be called a “just war.”

It is an escalation that ignores the common good of the world for the sake of national pride or flawed strategy. From a moral standpoint, an ongoing war that causes this much misery without a clear, just cause is a war that needs to end—not with a “victory,” but with a return to the hard, necessary work of peace.

Pope Leo XIV: “So many victims, so many lives and families shattered, such immense destruction, such unspeakable suffering! Every war is truly a wound inflicted upon the entire human family; it leaves in its wake death, devastation and a trail of pain that marks generations. Peace cannot be postponed. It is an urgent necessity that must find a home in our hearts and be translated into responsible decisions.”

© Eurasia Review