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There is a particular kind of optimism that sounds beautiful in speeches and falls apart on contact with reality. It goes something like this: if we just remove the barriers between peoples, if we dissolve the lines on maps and let cultures flow freely into one another, peace will follow naturally. Humanity will recognize its shared essence. Conflict will melt away like snow in spring.
Samuel Huntington did not buy it. And the decades since he published The Clash of Civilizations in 1993 have given us more reasons to take his skepticism seriously than most of his critics would like to admit.
His argument was not complicated, though it was frequently misrepresented. Huntington claimed that the primary sources of conflict in the post Cold War world would not be ideological or economic. They would be civilizational. The deepest divisions among human beings are cultural. Religion, language, tradition, and historical memory do not dissolve when you open a border crossing. They intensify when forced into proximity without clear boundaries.
The implication was jarring to liberal internationalists: peace does not come from eliminating borders. It comes from getting them right.
The Romance of Borderlessness
To understand why Huntington’s thesis still provokes anger, you have to understand the intellectual atmosphere he was writing against. The early 1990s were drunk on a very specific fantasy. The Berlin Wall had fallen. The Soviet Union had collapsed. Francis Fukuyama had declared the end of history, suggesting that liberal democracy had won the final argument. The future, in this telling, was one of convergence. All nations would eventually look like variations on the same theme: democratic, capitalist, interconnected, and fundamentally compatible.
Borders, in this worldview, were relics. They were the scars of old conflicts, the bureaucratic residue of nationalism. The European Union was busy proving that you could stitch together ancient rivals into a single economic and political fabric. Globalization was not just an economic process. It was a moral project. More connection meant more understanding. More understanding meant more peace.
Huntington looked at this and essentially said: you are confusing the intermission for the end of the play.
He argued that Western civilization was not universal. It was particular. Its values, its institutions, its assumptions about individual rights and secular governance were products of a specific historical experience. Other civilizations had different foundations. Confucian, Islamic, Hindu, Orthodox, Japanese, Latin American, and African civilizations each carried their own deep structures of meaning. These were not superficial preferences that would wash away with enough trade agreements and student exchange programs.
The borders that mattered most were not the ones drawn by diplomats. They were the ones carved by centuries of divergent development.
What Borders Actually Do
There is a common misunderstanding about borders that runs through most arguments against them. The assumption is that a border is primarily a wall. Something that keeps people in or out by force. A tool of exclusion and control.
But borders serve another function that is far less dramatic and far more important. They are containers of political and cultural coherence. They define the space within which a group of people can govern themselves according to shared assumptions. They are, in a real sense, the precondition for self determination.
Think of it this way. A conversation requires a common language. Not just literally, though that helps, but a shared framework of meaning. When two people argue about justice within the same cultural tradition, they are drawing on common references. They may disagree violently, but they disagree within a system that both recognize. Take away the shared framework and you do not get a richer conversation. You get mutual incomprehension dressed up as dialogue.
Huntington saw borders as performing precisely this function on a civilizational scale. The boundaries between major cultural blocs were not obstacles to peace. They were the structures that made internal peace possible. Within a civilization, conflicts could be mediated through shared institutions and values. Between civilizations, those mediating structures did not exist in the same way.
This is not an argument for isolation. It is an argument for clarity.
The Fault Lines
Huntington identified what he called “fault line conflicts,” wars and tensions that occurred at the boundaries where civilizations met. The evidence he marshaled was uncomfortable for those who preferred structural or economic explanations for violence.
The Balkans. The Caucasus. Kashmir. The border between the Islamic world and sub Saharan Africa. Israel and Palestine. These were not random hotspots. They were places where civilizational plates ground against each other, where populations with fundamentally different assumptions about law, religion, and social order were forced into shared political spaces without shared political foundations.
The pattern was striking, and it has only become more visible since Huntington first described it. The conflicts that have proven most intractable in the 21st century are precisely the ones that sit on civilizational boundaries. They resist diplomatic solutions not because the diplomats are incompetent but because the underlying disagreements are not really about territory or resources. They are about identity. About what kind of society people want to live in. About questions that do not have compromise positions.
You can split a piece of land in half. You cannot split a sacred site in half and expect both sides to feel whole.
The European Experiment
No discussion of Huntington’s thesis is complete without addressing the European Union, which was and remains the most ambitious attempt to prove him wrong.
The EU was built on the premise that shared economic interests could override cultural differences. And within Western Europe, this worked remarkably well for decades. France and Germany, which had spent centuries trying to destroy each other, became partners in a project of integration that brought genuine peace and prosperity.
But notice what made this possible. France and Germany, for all their historical conflicts, belong to the same civilization. Western Christianity, Enlightenment rationalism, democratic governance, and a broadly shared legal tradition provided the common ground on which economic integration could be built. The EU did not transcend civilizational boundaries. It operated within one.
The cracks appeared when the project tried to expand beyond those boundaries. Turkey’s long and ultimately failed bid for EU membership was not blocked by technical criteria alone. The resistance was civilizational. Many Europeans, whether they articulated it this way or not, sensed that integrating a large Muslim majority nation into a project built on Western European assumptions would not simply add a new member. It would change the nature of the project itself.
The migration crisis of 2015 brought these tensions to the surface with a force that no amount of diplomatic language could contain. Millions of people from outside Western civilization arrived in countries whose populations had not agreed to a fundamental renegotiation of their cultural identity. The political backlash was not simply a matter of racism or xenophobia. It was a reaction to the sudden blurring of boundaries that Huntington had warned were load bearing.
Remove a wall and you might create a larger room. Remove a load bearing wall and you bring the ceiling down.
The Psychology of Boundaries
There is an interesting connection here to a completely different field: developmental psychology. The psychologist who studies healthy human development will tell you that boundaries are not the enemy of good relationships. They are the foundation of them.
A person without boundaries is not generous. That person is codependent. A person who cannot say no cannot truly say yes. The capacity to distinguish self from other, to maintain a coherent identity while engaging with people who are different, is a mark of psychological maturity. Not rigidity.
Huntington was making an analogous argument at the civilizational level. Cultures that know who they are, that maintain clear boundaries around their core institutions and values, are better equipped to engage with other cultures peacefully. It is not the confident civilization that starts wars of aggression. It is the insecure one. The one that feels its identity slipping away. The one that cannot tell where it ends and the other begins.
This is why the hardening of borders is often a response to, not a cause of, instability. When people feel that the boundaries protecting their way of life are eroding, they do not become more open. They become more defensive. And defensive populations are dangerous populations. They elect leaders who promise to restore clarity by force. They turn inward. They find enemies.
Huntington would argue that the way to prevent this spiral is not to tell people their boundaries do not matter. It is to give them boundaries they can trust.
The Objections
Critics of Huntington have never been in short supply, and some of their objections deserve serious consideration.
The most common is that his civilizational categories are too neat. Real cultures are messy. They blend into each other at the edges. A person in Istanbul is not simply “Islamic” or “Western.” That person carries multiple identities, multiple loyalties, multiple cultural influences. Reducing the complexity of human identity to a handful of civilizational blocs, the critics say, is intellectually lazy and politically dangerous.
This is fair, as far as it goes. Huntington’s categories were indeed broad. But the question is not whether they are perfect. The question is whether they are useful. When you overlay his civilizational map onto a map of the world’s most persistent conflicts, the correlation is difficult to explain away. The model is imprecise. It is not wrong.
Another objection is that Huntington’s thesis can become a self fulfilling prophecy. If political leaders accept that civilizational conflict is inevitable, they will make decisions that produce it. This is a serious concern. But it mistakes description for prescription. Huntington was not arguing that civilizations should clash. He was arguing that they would, if the boundaries between them were not managed wisely.
A doctor who tells you that you are at risk for heart disease is not hoping you have a heart attack. The diagnosis is the first step toward prevention.
What Harder Borders Actually Look Like
It is worth being specific about what Huntington’s argument implies in practice, because “harder borders” is a phrase that conjures images of barbed wire and armed guards. That is not necessarily what is being proposed.
A harder border can be a clearer set of expectations. It can mean that nations are honest about the cultural prerequisites for their political systems. It can mean that international institutions stop pretending that all value systems are equally compatible with all forms of governance. It can mean that immigration policy accounts for cultural integration, not just economic contribution.
It can also mean, paradoxically, more respectful engagement between civilizations. When you know where the boundaries are, you can negotiate across them with clarity. When the boundaries are blurred, every interaction becomes a potential identity crisis.
Think of it like neighboring houses. Good fences make good neighbors, as Robert Frost almost said. (He was actually being ironic in that poem, but the line has outlived his irony because it contains a truth he may not have intended.)
Countries and civilizations that maintain clear internal coherence can afford to be generous in their external dealings. They can trade, cooperate, and even admire each other without feeling threatened. It is the nations that have lost confidence in their own identity that become aggressive or paranoid.
The Uncomfortable Truth
The deepest discomfort with Huntington’s thesis comes from a place that has nothing to do with evidence. It comes from the feeling that his argument is morally wrong. That saying cultures are fundamentally different is a step away from saying some cultures are better than others. That drawing harder lines between peoples is a step toward dehumanizing those on the other side.
This fear is understandable. History gives us plenty of reasons for it. But conflating distinction with hierarchy is itself a kind of intellectual failure. Recognizing that Japanese civilization and Latin American civilization operate on different foundational assumptions does not require ranking them. It requires acknowledging that the differences are real, that they matter, and that pretending they do not exist does not make them go away. It makes them explosive.
Huntington was not a warmonger. He was a cartographer. He was trying to map the terrain as it actually existed, not as idealists wished it to be. And the central lesson of his work is one that still makes people uncomfortable precisely because it is so difficult to refute.
Peace is not the absence of boundaries. It is the presence of the right ones. The world does not become safer when borders dissolve. It becomes safer when borders are clear enough that everyone knows where they stand. When civilizations can develop according to their own logic without being forced into someone else’s framework.
The dream of a borderless world is a generous one. It speaks well of those who hold it. But generosity is not strategy. And when the generous dream meets the complicated reality of human difference, it is usually the dream that breaks.
Huntington understood this. The question is whether we will understand it before or after the next fault line catches fire.
