Over eighty years, the partnership across the Atlantic was grounded in a common promise to joint protection and a shared principles centered on democratic governance, human rights, and the rule of law.
That defining era was formally launched in March 1947 during a concise speech by President Harry Truman, who pledged American support to defend Europe from additional encroachment by the Eastern bloc.
The US spearheaded NATO, the International Bank for Reconstruction and Development, the International Monetary Fund, and the United Nations. It embedded itself into what later became known as the "framework of international law", a system where countries committed to shared responsibilities designed to shield liberal democracies from adversarial dictatorships.
Now, the latest US National Security Strategy (NSS), released in December, signals that, from the Washington's perspective, that shared endeavor has ended; much of what the world took for granted regarding America's role is a thing of the past.
The review mentions the "so-called 'rules-based international order'", placing the latter phrase in quotation marks: a form of delegitimization through stylistic choice.
Deputy JD Vance cautioned America's allies in Europe of this impending shift during a address at the Munich conference in February 2025.
"He stated bluntly that the genuine danger to Europe did not come from Russia but from internal sources - from those limiting discourse, stifling opposition and thereby weakening European democracy," the speech noted. He was highly critical of the "progressive liberal establishment."
The Paris-based daily Le Monde described the address as a declaration of "value-based struggle" against Europe.
The recent NSS elevates Vance's observations, transforming them from rhetoric into formal strategy.
"Without a doubt America is not the country that promoted the global values that have been dominant since the post-1945 era," observes a previous high-ranking figure from the American diplomatic corps and a research organization. "It is moving to a fundamentally altered stance."
Consequently, if the world is indeed abandoning that longstanding system, what is it evolving into? And what are the consequences for the rest of the world, and specifically for Europe?
"Multilateral organizations, notably the United Nations, have been marked by strong anti-US bias, and have been ineffective for our or any other specific interest," argues a vice-president at a prominent right-wing think tank.
According to her analysis - she previously served as Deputy National Security Adviser to the former President - evolution to the global system is inevitable in a dynamic global environment.
"The other issue we face is that when that much-discussed rules-based international order was created after the WWII, 80 short years ago, Chinese power was not a significant issue. We are living in a changed global landscape."
This rules-based order, constructed in the years following the global conflict, was the brainchild of a generation that had lived through the horrors of major power rivalry and was resolved to stop its recurrence.
That global architecture, blemished and partial though it certainly had been, was the product of that painful memory.
However, the NSS contends that American strategy veered off course in the post-Cold War era - and it places blame on what it calls "American foreign policy elites."
"They lashed American policy to a array of international institutions, some of which are fueled by open hostility to the US and many by a transnationalism that openly aims to dissolve national sovereignty," it reads.
It suggests that in the future, the US will seek to curtail the power of supranational bodies.
"The core actor in international relations is and will remain the sovereign country… We stand for the independent authority of nations, against the power-diluting interventions of the most interfering international agencies…"
Elsewhere in the document, considering the "international equilibrium", it states: "The greater clout of larger, richer, and stronger nations is a enduring reality of global affairs."
Moscow reacted to the review with approval, stating that much of it was consistent with Moscow's own outlook.
"I believe the leaders of the US, China, and Russia and their supportive regimes are seeking to revert to an era of major power rivalry," observes a retired leader of the British military.
Yet, a leading academic in War Studies believes the new Security Strategy is not such a fundamental shift with the past as it may appear.
"It is important to be wary about the rules-based international order, which is a expression that came into general use in the last decade or so," he argues. "Consider the past and you find plenty of violations of the rules, the Vietnam War for example. So there's a tendency to romanticize about the past at times and everyone should be careful about nostalgia for what was a multifaceted era."
The US's covert action in the city of Caracas that led to the capture of the country's leader Nicolas Maduro is an initial instance of this robust demonstration of national prerogative.
Some jurists have questioned the legality of the administration's actions, arguing it may have breached global laws governing the armed action.
Washington asserts its actions were legally justified.
"Under American law it certainly was [legal]," a ex-defense department figure has stated. "He - most of our European friends have not recognised his regime so he is an unlawful ruler. Because of that he is deprived of the usual immunities that sovereigns would have...particularly when we are looking at constitutional provisions that exist in the United States, that would override anything the UN says."
The NSS declares, for the United States, the right to be the pre-eminent power in the Americas, and to persuade its hemispheric neighbors into conformity with Washington's interests.
This is a muscular reassertion of the
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