‘Once or Twice a Century’: Mark Carney’s Stark Warning as Global Order Shifts

In a moment of profound global instability, the Canadian prime minister has delivered a frank assessment that is turning heads from Ottawa to Davos.

Mark Carney, the Canadian prime minister, stood before a gathering of world leaders and economic policymakers and delivered a striking declaration: the world now finds itself at a juncture that arrives only once or twice in a century. His words, measured yet freighted with consequence, were not the typical diplomatic pleasantries that often characterize such summits. Instead, they served as a stark acknowledgment that the foundational structures of the global economy, international alliances, and even the concept of stability itself are undergoing a seismic recalibration. The statement cuts through the noise of daily headlines, forcing a collective pause to consider the magnitude of the forces currently reshaping the geopolitical map.

Carney’s framing of the moment as one occurring only “once or twice a century” is a deliberate invocation of historical grandeur. It places the current era alongside the cataclysmic shifts of the 20th century—the transformative aftermath of the Second World War, the collapse of the gold standard, or the sudden and disorienting end of the Soviet Union. He is signaling that we are not merely witnessing a cyclical economic downturn or a temporary diplomatic rift; we are participants in a wholesale reconfiguration of how nations interact, how trade flows, and how power is distributed. The power of his phrasing lies in its permanence. It suggests that the choices made in the coming years by the United States, Canada, China, Europe, and other key players will not simply dictate the next business cycle, but will set the parameters for decades, potentially influencing generations who are not yet born.

The economic dimensions of this “once in a century” moment are arguably the most immediately visible. The post-Cold War consensus of liberalized trade, open borders for capital, and a rules-based international order has fractured under the weight of pandemic-era supply chain failures, soaring inflation, and the weaponization of critical commodities. Carney, who previously steered the Bank of Canada through the 2008 global financial crisis and later led the Bank of England, speaks with the unique authority of a technocrat who has witnessed the inner mechanics of financial collapse. His warning carries an implicit critique of the status quo: the era of unquestioned dependence on globalized supply chains has ended. The renewed focus on industrial policy, subsidies, and domestic manufacturing—from the U.S. Inflation Reduction Act to Canada’s critical mineral strategy—marks a decisive return to defense of the national interest over the cold calculus of corporate efficiency.

Yet, the prime minister’s comments extend far beyond trade deficits and interest rates. He is pointing to a structural shift in the very architecture of geopolitics. The postwar alignment, anchored by the Atlantic alliance, is straining as political polarization intensifies within democracies and rival powers grow more assertive. The rise of the BRICS bloc, the deepening relationship between Moscow and Beijing, and the unpredictable volatility of American foreign policy under successive administrations have created a multipolar world where the old securities—NATO’s cohesion, mutual supply chains, shared data agreements—can no longer be taken for granted. Carney’s implication is clear: the second half of the 21st century will not resemble the first. The world is moving from a unipolar era dominated by a single superpower to a contested, fragmented landscape where economic security and national security are inextricably linked, and where prosperity must be earned through resilience rather than inherited through alignment.

For Canada, Carney’s message is both a warning and a call to action. Geographically nestled beside the United States, culturally linked to Europe, and economically dependent on a vast export market, Canada is uniquely vulnerable to the ping-ponging of global trade policy. The tenure of Donald Trump, marked by tariffs and the renegotiation of NAFTA into the USMCA, demonstrated to Ottawa that even the most reliable allies can become sudden adversaries in the realm of commerce. Carney’s speech signals an end to the era of quiet diplomacy running mostly on autopilot. It demands a proactive Canadian strategy: diversifying export markets through the Pacific, strengthening ties with the European Union, investing heavily in the country’s critical mineral sector, and building the infrastructure required to ship energy, particularly liquefied natural gas, to markets outside North America. The moment demands new pipelines, new ports, and new digital frameworks—policies that will define whether Canada seizes the opportunity or is simply swept along by the currents of larger powers.

But the charge extends beyond policy silos into the very realm of social and civic resilience. A “once in a century” shift is not merely economic; it is existential. The erosion of public trust in institutions, the rise of disinformation on a global scale, and the existential shadow of climate change are all ingredients in this mixture of epochal change. Carney, who also served as the UN Special Envoy for Climate Action, is acutely aware that the green transition is the defining infrastructure project of this generation. The transition away from hydrocarbons, the electrification of transport, and the development of emerging technologies for carbon capture will dictate which nations emerge as the leaders of the next era. In this sense, the current period resembles the early decades of the 20th century, when the shift from coal to oil realigned global power dynamics. Those nations that hesitate to adapt to the new energy economy risk being left behind, locked into declining industries, and rendered obsolete in the new geopolitical configuration.

As Carney’s words resonate, the question that hangs in the air is one of agency. Do nations and leaders have the fortitude to shape the transition, or will the transition shape them? History suggests that the “once or twice a century” moments are rarely gentle. They are born of crisis—the aftermath of World War I, the Great Depression, World War II—and are characterized by chaos and violence as much as by opportunity. However, this current inflection point offers a unique variable: the possibility of intentionality. We have the data, the technology, and the historical perspective to anticipate the upheaval. The challenge, as Carney rightly implies, is finding the political will to act before the chaos fully engulfs the system.

In delivering his assessment, Carney has positioned Canada not as a commentator but as an interested participant, intent on navigating the rapids. His lifetime portfolio—from Harvard to Goldman Sachs, from the Bank of Canada to the Bank of England, and now to the Prime Minister’s Office—has been a study in adaptability. He is a character who embodies the transition from the management of capital flows to the management of national destiny. His career has been a bridge between the world of high finance and the gritty reality of public policy. Now, it appears, all of those skills will be tested in what promises to be the most critical phase of his public life.

The next few years will, without question, define the contours of the next half-century. Nations will be pulled in opposing directions—toward autarky and self-reliance on one side, and toward renewed integration on the other. The resolution of this tension will depend on diplomatic skill, economic foresight, and a shared commitment to the preservation of a global order that ensures the stability of the world’s financial systems. Carney, setting a deliberate tone with his “once or twice a century” phrasing, has made clear that the Canadian government intends to approach these challenges with a sense of urgency that matches the gravity of the hour. He is framing the fight not as a routine exercise in crisis management, but as a foundational project—one that requires a level of national unity and global cooperation that has been sorely lacking in recent years.

Ultimately, the prime minister’s declaration is a tour de force of rhetoric, but its value will only be measured in action. The decline of the West is not inevitable; the rise of a multipolar periphery is not necessarily a threat. The only true threat lies in inertia—the failure to recognize that the assumptions of the past are insufficient for the demands of the future. In Carney’s view, the window of opportunity is finite. To be a leader in the new era, a nation must be willing to shed the opacity of the old. For Canada, this is a chance to emerge from the shadow of its southern neighbor and take a leading role in the new global order. But opportunity not seized is simply a missed chance—and the clock is ticking.

In concluding, the gravity of Carney’s message serves as a clarion call to politicians, CEOs, and citizens alike. It is a reminder that we live in exceptional times, and that exceptional times call for exceptional foresight, courage, and ambition. The world, indeed, is at a point that comes once or twice a century. How we respond to this point will be the story that historians write about in the centuries yet to come. And the opening chapter of that history is being written right now, in the decisions we make today.