Donald Trump remained the central figure at the United Nations this week, but the significance of his appearance went beyond the familiar spectacle of an American president commanding the international stage. Beneath the diplomatic choreography, a more consequential development was becoming visible: America’s allies and partners are increasingly trying to preserve their relationships with Washington while simultaneously preparing themselves for a world in which they cannot assume that American power will always operate in the same way, or that U.S. strategic priorities will always coincide with their own.
Trump’s return to the United Nations therefore revealed a paradox at the heart of the international system. The United States remains indispensable to global security, finance, technology and military power, yet the willingness of other states to depend on Washington without developing alternatives is weakening.
This does not mean that America’s allies are abandoning the United States. Far from it. NATO remains central to European security, Washington remains a critical military partner for countries across Asia and the Middle East, and American markets and technology remain deeply embedded in the global economy.
What is changing is the calculation.
Governments are increasingly asking what they should do if American foreign policy becomes more transactional, more unpredictable or more explicitly centered on U.S. national interests.
That question was particularly visible at this year’s UN gathering.
Iran exposes the limits of allied alignment
Trump’s confrontation with Iran has become one of the clearest tests of this changing relationship.
His warning that Iran could face devastating consequences if an agreement is not reached has placed America’s allies in an uncomfortable position. European governments and other U.S. partners face a difficult choice: support Washington’s objective of preventing Iran from becoming a nuclear power while avoiding being drawn into a wider war whose economic and security consequences would extend far beyond the Middle East.
The problem is not simply Iran’s nuclear program.
The conflict has disrupted shipping and energy markets and placed enormous pressure on the Strait of Hormuz and the wider maritime system connecting the Persian Gulf to global markets. The consequences are therefore global, while the strategic decisions remain concentrated in Washington, Tehran and the regional powers directly involved.
That creates an uncomfortable asymmetry.
America can decide to escalate, negotiate or impose additional economic pressure. European and Asian economies must then absorb much of the resulting economic shock.
This is one reason why the language coming from America’s partners increasingly combines cooperation with calls for greater strategic autonomy.
Canada provides one example of this broader trend. Ottawa has sought to preserve its relationship with Washington while simultaneously diversifying its economic and diplomatic relationships. The logic is straightforward: maintaining close ties with the United States does not necessarily require making the Canadian economy or foreign policy entirely dependent on decisions taken in Washington.
That calculation is increasingly visible elsewhere as well.
The search for autonomy is no longer ideological
For years, the idea of strategic autonomy was often treated as a European concept or as an ambition of emerging powers seeking greater room for maneuver.
It is now becoming a practical necessity for a much wider range of states.
Governments are attempting to diversify their economic relationships, energy supplies, technology partnerships, defense arrangements and diplomatic channels.
The objective is not necessarily to replace the United States.
It is to avoid being left without alternatives if U.S. policy changes.
That distinction is critical.
Strategic autonomy does not necessarily mean strategic independence. A country can remain deeply connected to Washington while simultaneously developing relationships with Beijing, Brussels, New Delhi, Ankara, Riyadh, Tokyo or other centers of power.
The international system is increasingly moving in precisely this direction.
States are hedging.
They cooperate with the United States on security while expanding commercial relations with China. They participate in Western institutions while developing ties with emerging economic powers. They seek American military protection while demanding greater freedom of diplomatic maneuver.
This is not the collapse of the American-led system.
It is its transformation.
AI is becoming another arena of strategic sovereignty
Artificial intelligence is adding another dimension to the debate.
Governments are increasingly concerned that the future of AI cannot be determined exclusively by a small number of technology companies or governments.
The debate is therefore shifting from whether AI should be regulated to who should control the rules governing its development.
Several governments have advocated greater international coordination over AI, including stronger safeguards, human oversight and mechanisms for international cooperation.
Washington’s approach has been more skeptical of comprehensive international restrictions that could limit technological development.
The disagreement reflects a much larger strategic question.
Who controls the technologies that will define economic productivity, military capability, intelligence collection and political influence in the next decade?
AI is no longer simply a technological issue.
It is becoming an instrument of national power.
Countries that depend entirely on foreign technology will increasingly face the same dilemma they have faced with energy, military equipment and financial systems: dependence creates vulnerability.
Consequently, technological sovereignty is emerging alongside strategic autonomy.
Greenland reveals the new geography of power
The agreement signed by the United States, Denmark and Greenland on September 22 illustrates another dimension of this changing international environment.
The agreement expands the American military presence in Greenland and provides for additional U.S. bases and extensive operational access, while restricting the strategic and military presence of non-NATO actors. It also preserves the principle of Greenlandic self-determination and establishes that the agreement has no fixed end date.
The agreement is significant because Greenland has become one of the most strategically important territories in the emerging Arctic competition.
The Arctic is no longer a remote geopolitical space.
Melting sea ice, new shipping possibilities, critical minerals, missile-defense requirements and competition involving Russia and China have transformed its strategic importance.
For Washington, Greenland represents geography, military access and continental defense.
For Denmark and Greenland, however, the question is more complicated.
They must manage their relationship with the United States while protecting their own political interests and maintaining control over their future.
The agreement may therefore reduce one source of transatlantic tension while simultaneously demonstrating the bargaining dynamics of the new era.
The United States remains powerful enough to shape the strategic environment.
But its partners increasingly expect to negotiate the terms of that relationship rather than simply accept them.
Europe is learning to hedge
Europe faces perhaps the most difficult version of this dilemma.
For decades, European security rested heavily on the assumption that American military power would remain the ultimate guarantor of the transatlantic order.
That assumption has not disappeared.
But European governments increasingly recognize that they need greater military, economic and technological capacity of their own.
The question is no longer whether Europe should cooperate with Washington.
It is how much strategic room Europe should retain if Washington chooses a different course.
The war involving Iran has reinforced that dilemma. European governments must contend with energy insecurity, maritime disruption, migration pressures and regional instability while having limited influence over the decisions that could trigger or end escalation.
That creates an incentive to strengthen independent diplomatic and military capabilities.
The same logic applies to Britain.
London remains closely aligned with Washington on the security challenges posed by Iran, but it also seeks a role in diplomacy and crisis management rather than simply functioning as a supporting actor in an American-led strategy.
The distinction matters.
An ally can support American objectives without surrendering its own strategic judgment.
The Middle East is making the same calculation
The Middle East provides an even clearer illustration of the emerging multipolar environment.
Gulf states have spent decades relying heavily on American security guarantees.
Yet the region has also undergone a dramatic expansion of relationships with China, Russia, Türkiye, India and other powers.
Saudi Arabia, the United Arab Emirates, Qatar, Oman and other regional actors increasingly maintain multiple diplomatic channels simultaneously.
They cooperate with Washington.
They maintain economic relationships with Beijing.
They engage with regional rivals.
They develop independent diplomatic initiatives.
And they increasingly seek to prevent regional crises from becoming conflicts in which they have little control over the outcome.
The current crisis surrounding Iran, Hormuz and regional maritime security reinforces this behavior.
For the Gulf states, the central question is not simply whether America remains powerful.
It is whether American power can guarantee regional stability without producing a wider conflict that threatens their economies and security.
That is why diplomacy has become as important as deterrence.
The end of unquestioned dependence
Trump’s presence at the United Nations demonstrated that the United States remains the most consequential individual power in the international system.
But influence and dependence are not the same thing.
America can still dominate diplomatic attention while its allies simultaneously work to reduce their vulnerability to American decisions.
This is the paradox of the emerging international order.
The United States remains indispensable, yet fewer countries appear willing to make themselves entirely dependent on it.
China’s rise is one reason.
Russia’s confrontation with the West is another.
The growing importance of India, Türkiye, Saudi Arabia, the UAE and other regional powers is another.
Technological competition, energy insecurity and the fragmentation of global trade are additional forces pushing governments toward diversification.
The result is not necessarily a post-American world.
It is a world in which American power increasingly operates alongside other centers of influence.
That distinction is crucial.
The United States may remain the strongest military and financial power for years to come. But the ability of Washington to determine the strategic choices of other governments is becoming more conditional.
Countries want American security partnerships without automatic alignment.
They want American investment without excessive dependence.
They want access to American technology without surrendering technological sovereignty.
They want cooperation with Washington while maintaining relationships with Beijing and other emerging powers.
And they want diplomatic freedom when conflicts arise that do not directly serve their national interests.
A more transactional international system
The international order emerging from this period is therefore likely to be more transactional and more fluid.
Alliances will remain important, but alliances alone will no longer determine foreign-policy behavior.
States will increasingly organize themselves around overlapping interests.
A country may be an American security partner, a Chinese economic partner and a regional diplomatic mediator at the same time.
That is not necessarily contradiction.
It is the logic of multipolarity.
Trump’s UN appearance exposed this reality.
He still commanded the world’s attention because American power remains enormous. But the behavior of America’s allies and partners suggested that they are no longer planning their futures on the assumption that Washington will always provide the same answers.
The emerging question is therefore not whether America is losing its power.
It is whether other countries are becoming more capable of operating around it.
That is a very different proposition.
The world is not necessarily entering a post-American era.
It may instead be entering a post-dependence era — one in which the United States remains the most powerful actor, but where its allies, partners and rivals increasingly possess the economic, diplomatic and strategic alternatives necessary to pursue their own interests.
The United Nations this week offered a glimpse of that transition.
Trump remained at the center of the room.
But increasingly, the countries around him are learning how to build a world in which they do not have to remain there.
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