Eighty years later, Potsdam should be understood less as a discrete historical event and more as a foundational moment in the architecture of modern international order. It helped define the institutional grammar of global politics, including the role of great powers, the structure of collective security and the emergence of multilateral governance. At the same time, it embedded tensions that remain unresolved, particularly around legitimacy, equality and the limits of shared authority.

What Potsdam Delivered: Stability Through Institutionalised Power

The most immediate achievement of the Potsdam framework was the creation of a structured international system designed to prevent a return to total war among major powers. This was not based on the elimination of conflict, but on its containment within institutional channels.

The establishment of the United Nations system, and in particular the Security Council with its permanent members, created a mechanism through which the most powerful states could manage rivalry without direct military confrontation. This was a pragmatic solution rather than an ideal one. It reflected the geopolitical reality of 1945, but it also introduced a degree of predictability into international relations that had been absent in the interwar period.

Over time, this structure enabled a wider process of institutionalisation in global politics. International law expanded, multilateral organisations proliferated and economic reconstruction became embedded in a rules-based framework. Even during the Cold War, when ideological and strategic confrontation defined global politics, the basic architecture of managed interaction between major powers remained intact.

In this sense, Potsdam delivered not only stability, but also a platform for long-term recovery and development across much of the world.

What It Failed to Deliver: Equality, Universality and Full Legitimacy

Despite its stabilising achievements, the Potsdam settlement did not create a fully universal system of governance. It was built on a structured hierarchy of power that privileged a small number of states as permanent arbiters of global security.

This design reflected geopolitical realities, but it also introduced a persistent tension between authority and legitimacy. Many states were incorporated into the system as participants rather than co-authors. As decolonisation progressed in the decades that followed, this asymmetry became more visible and politically significant.

The result has been a lasting gap between formal equality in principle and differentiated influence in practice. While the international system expanded in membership and scope, its core decision-making structures remained largely unchanged. This has contributed to recurring debates about representation, reform and the credibility of global institutions.

In addition, Potsdam did not resolve the deeper structural tension between sovereignty and collective security. The system assumed that great powers would act as stabilisers, yet it did not establish robust mechanisms to manage situations where their interests diverged. This limitation has become more pronounced in recent years, as geopolitical competition has re-emerged in a more fragmented and less predictable form.

What Remains Unfinished: Accountability in a Dispersed System

One of the most persistent legacies of the Potsdam order is the incomplete development of accountability within global governance. While institutions were created to manage conflict and coordinate action, less attention was given to how responsibility would be defined, distributed and enforced when those systems failed or were bypassed.

This issue has become more visible in contemporary international relations, where decision-making is increasingly dispersed across multiple layers. States, alliances, international organisations, regulatory bodies and private actors all contribute to outcomes that are often collectively produced but not clearly attributable.

In such a system, authority is fragmented while consequences remain shared. This creates a structural ambiguity in which it is often difficult to identify where responsibility lies. The problem is not simply legal or institutional, but political. It concerns the capacity of governance systems to maintain trust when causality and accountability are distributed across complex networks.

This unfinished dimension of Potsdam’s legacy is particularly relevant in areas where technical systems intersect with strategic risk, including energy infrastructure, digital systems and nuclear governance. In these domains, the gap between decision-making and consequence is often wide, while the demand for clarity and accountability is increasing.

Lessons for Today: Cooperation Under Conditions of Strategic Fragmentation

The most important lesson from Potsdam is not the design of a perfect institutional system, but the recognition that governance under conditions of deep disagreement is possible if structured channels for cooperation exist. The postwar order functioned not because it eliminated rivalry, but because it institutionalised it.

This principle remains relevant, but it is now under greater strain. The contemporary international system is characterised by a higher degree of interdependence combined with increasing strategic fragmentation. Economic, technological and security systems are deeply interconnected, yet political alignment is less stable and more contested.

This creates a paradox. The need for cooperation is greater than ever, particularly in relation to global risks such as nuclear safety, climate stability and critical infrastructure resilience. At the same time, the political conditions for sustained cooperation are more fragile.

In this context, cooperation cannot be assumed as a default condition. It must be actively maintained through transparency, communication and institutional resilience. This applies not only in moments of crisis, but also in periods of relative stability, when the incentives for coordination are often weaker but the need for preparation is greater.

The Return of Systemic Pressure: From Managed Order to Competitive Pluralism

Eighty years after Potsdam, the international system is again experiencing systemic pressure, although in a different form. The post-war assumption of gradual convergence around shared norms has weakened. Instead, multiple centres of power are shaping overlapping and sometimes competing models of order.

This does not represent a simple breakdown of the post-1945 system. Rather, it reflects its transformation under new conditions. The institutional structures created after Potsdam have not disappeared, but their ability to absorb and regulate geopolitical divergence has diminished.

The result is not chaos, but a more complex form of competitive pluralism, in which cooperation and competition coexist in unstable equilibrium. Managing this condition requires not only institutional reform, but also a renewed understanding of how order is sustained when consensus is partial rather than comprehensive.

Potsdam as an Ongoing Governance Responsibility

The legacy of the Potsdam Conference is neither a complete success story nor a narrative of failure. It is better understood as an incomplete project of global governance that combined institutional innovation with enduring structural limits.

Its achievement lies in demonstrating that even after systemic conflict, states can construct frameworks for cooperation that reduce the risk of large-scale war. Its limitation lies in the fact that these frameworks remain dependent on political commitment rather than embedded guarantees of compliance or equity.

Eighty years on, the central issue is not historical commemoration but institutional learning. The question is whether the current international system can adapt the core insight of Potsdam, that structured cooperation is possible even among rivals, to conditions that are more fragmented, more interconnected and more technologically complex than those of 1945.

In that sense, Potsdam is not only a historical reference point. It remains an active responsibility.

Contribution by Dr. Erkki Tuomioja

The Potsdam Conference was the last of the three Big Three meetings which shaped the post-war world order, which was mostly agreed earlier in February 1945 at Yalta. It did bring stability to the world and prevented the Cold War from escalating into World War III, but it did not deliver democracy and freedom, neither to those who ended in the Soviet sphere of influence nor to those governed by the rule of the European colonial powers.

This world order was based on the leading role of the Big Three, which was soon reduced to the Soviet-US duopoly. This no longer works as their dominance has diminished and new powers have emerged to compete with them.

While the dismantling of the colonial order and the collapse of the Soviet Union opened new possibilities for development, peace and democracy, the hopes these raised have sadly remained unfulfilled. The growth of global interdependence and the unprecedented threats to humankind posed by climate change, the loss of biodiversity and nuclear weapons call for the strengthening and renewal of the rules-based world order on a more equitable basis and focusing on the need to concentrate the efforts of the international community to counter these existential threats to humankind.

The Unforgivable Sin of the Potsdam Conference

Contribution by Dr. Yossi Beilin

The conference was the first summit of the world leaders after the war, following the brilliant victory over Nazi Germany. The first meeting after the war and the great victory over Nazi Germany. Roosevelt did not sit in the centre of the picture, and was replaced by Harry Truman, only 81 days after serving as his vice. Churchill arrived after the election, in which he lost his position (although the results of the election had not yet been announced). Stalin behaved as the great victor, and as the most experienced war leader. His associates adopted, to a large extent, the cloak he wore.

True, the international institutions established in the wake of the conference were of great importance, even if their price was the adoption of the status quo and an unwillingness to resolve protracted conflicts, which should have been resolved. But the unforgivable decision of the 10-day conference was Truman's acceptance that the countries of Eastern Europe, under the Soviet boot, would be communist states.

Truman demanded that these countries be run democratically, as had been decided at the Yalta Conference, just five months earlier. Stalin, in his endless cynicism, claimed that he was keeping his promise, because communist regimes were far more democratic than the countries that claimed to be Western democracies... Almost 50 years passed from this chilling concession in Potsdam to the fall of the Iron Curtain. An entire generation, so many millions, paid a terrible price for a lifetime of lies, fear, cruelty and murder.

• Independent