As the mandate of United Nations Secretary-General António Guterres draws to a close on 31 December 2026, the Organization faces one of the most consequential leadership transitions in its history. Amid escalating armed conflicts, geopolitical fragmentation, climate emergencies, technological disruption, and growing skepticism toward multilateralism, the selection of the next Secretary-General is no longer merely an institutional exercise, it is a defining moment for the future of global governance. The central question confronting Member States is therefore not simply who should lead the United Nations, but what kind of leadership the Organization requires to navigate the complex crises of the twenty-first century.
At no time since the end of the Cold War has the office of the United Nations Secretary-General carried greater strategic importance. From Ukraine and Gaza to Sudan, Haiti, Myanmar, and the growing risks posed by climate change, cyber threats, terrorism, artificial intelligence, and great-power competition, today’s international system is experiencing multiple crises simultaneously. The next Secretary-General will inherit an increasingly polarized world in which diplomacy is under strain, multilateral institutions are being challenged, and confidence in international cooperation is steadily eroding. More than a chief administrator, the next UN leader must serve as an effective mediator, an institutional reformer, and a trusted global statesperson capable of restoring confidence in the United Nations and the multilateral order.
The Race to Succeed António Guterres.
The process to select the ninth Secretary-General of the United Nations is now underway. In accordance with Article 97 of the UN Charter, the Secretary-General is appointed by the General Assembly upon the recommendation of the Security Council. In practice, however, the decisive stage occurs within the Security Council, where any of its five permanent members: China, France, Russia, the United Kingdom, and the United States can block a candidate by exercising its veto.
Since the appointment of António Guterres in 2016, the selection process has become considerably more transparent. Candidates are now expected to submit formal vision statements and curricula vitae, publicly present their priorities before Member States, and participate in informal dialogues with governments and civil society. Nevertheless, political negotiations among major powers remain the determining factor in the final outcome.
As of June-2026, six prominent international figures have emerged as leading contenders for the position, each bringing a unique combination of diplomatic, political, and multilateral experience.
Rafael Mariano Grossi (Argentina)
Currently serving as Director General of the International Atomic Energy Agency (IAEA), Grossi is internationally recognized for his leadership on nuclear non-proliferation, nuclear safety, and diplomacy surrounding the wars in Ukraine and the Middle East. His supporters view him as a pragmatic crisis manager with extensive experience negotiating among major powers.
Rebeca Grynspan (Costa Rica)
The current Secretary-General of the United Nations Conference on Trade and Development (UNCTAD) and former Vice President of Costa Rica, Grynspan is one of the world’s most respected experts on sustainable development, international finance, and economic diplomacy. She advocates strengthening multilateral cooperation, inclusive development, and institutional modernization.
Michelle Bachelet (Chile)
A former President of Chile and former United Nations High Commissioner for Human Rights, Bachelet is widely recognized for her leadership on human rights, gender equality, democratic governance, and conflict prevention. Her candidacy has renewed calls for the United Nations to appoint its first female Secretary-General.
María Fernanda Espinosa (Ecuador)
Former President of the United Nations General Assembly and former Minister of Foreign Affairs of Ecuador, Espinosa has built a distinguished diplomatic career focused on preventive diplomacy, climate governance, sustainable development, and strengthening the role of the General Assembly. She advocates a more transparent, representative, and people-centered United Nations.
Macky Sall (Senegal)
The former President of Senegal enters the race with extensive experience in African diplomacy, regional integration, and global development. His campaign emphasizes reform of the Security Council, stronger representation for the Global South, enhanced peacebuilding, and renewed confidence in multilateral institutions.
Carolyn Rodrigues-Birkett (Guyana)
Currently serving as Permanent Representative of Guyana to the United Nations, Ambassador Carolyn Rodrigue-Birkett is an accomplished Guyanese diplomat with more than 25 years of experience in public service and multilateral affairs. Previously she served as Guyana’s Minister of Foreign Affairs, and Director of the Food and Agriculture Organization Liaison Office in Geneva.
Although each candidate brings significant strengths, the selection extends far beyond individual qualifications. It represents a broader debate about the future direction of the United Nations itself. Many Member States continue to advocate for the election of the Organization’s first female Secretary-General, while others emphasize geographical balance, experience in international diplomacy, and the ability to navigate intensifying geopolitical rivalries.
The Security Council is expected to conduct a series of confidential straw polls before recommending a single candidate to the General Assembly later this year. The successful nominee will assume office on 1 January 2027, inheriting an institution confronted by unprecedented global challenges and rising expectations for reform.
From A Diplomatic Administrator to A Permanent Crisis Manager.
The twenty-first century has transformed the role of the United Nations Secretary-General from a largely diplomatic administrator into a permanent crisis manager. Wars in Ukraine and Gaza, climate disasters across Africa and Asia, pandemics, cyber insecurity, International and Domestic terrorism, forced migration, and rising geopolitical rivalry have exposed both the importance and limitations of the United Nations. The kicker is, this isn’t a new thought. The relevance of the UN and, in extension, its Secretary-General has been questioned since its inception.
The United Nations was established in 1945 in the aftermath of the devastating Second World War, a conflict that reshaped global politics and exposed the catastrophic consequences of failed international cooperation. The organization emerged as a successor to the earlier League of Nations, which had been created after the First World War with the primary objective of preserving peace and preventing another global conflict. However, the League ultimately failed to stop rising militarism, aggressive nationalism, and the outbreak of the Second World War. Its inability to enforce collective security and maintain unity among major powers demonstrated the limitations of weak international governance.
Learning from those failures, the founders of the United Nations sought to create a more structured and influential institution capable of maintaining international peace and security. Unlike the League of Nations, the UN was designed with stronger mechanisms for collective action, most notably through the Security Council and a broader framework for diplomacy, peacekeeping, humanitarian assistance, and international law. While critics often point to the UN’s inability to stop every conflict or humanitarian crisis, its success is frequently measured by the absence of a Third World War. In that sense, the organization has played a significant role in managing tensions among major powers and creating platforms for dialogue instead of direct global confrontation.
At the center of this institution is the Secretary-General, who serves as the chief administrative officer and moral voice of the United Nations. More than simply a bureaucratic figure, the Secretary-General is expected to act as a global diplomat, mediator, and crisis manager.
The idea of the Secretary-General as a “world leader” is therefore unconventional. Unlike heads of state, their leadership is not rooted in sovereignty or electoral mandate, but in the capacity to persuade, to de-escalate, and to create conditions for dialogue where none exist. This makes the office uniquely dependent on the consent and cooperation of member states, particularly the major powers whose geopolitical rivalries often define the limits of what is achievable. In this sense, the Secretary-General operates within a constrained architecture, where ambition must be calibrated against political reality.
This is where the evaluation of the Secretary-General’s effectiveness becomes inherently nuanced. Success is rarely absolute or easily measurable. It often manifests in outcomes that are invisible to the public eye: a conflict that did not escalate, a negotiation that prevented violence, or a diplomatic channel that remained open when others collapsed. Conversely, failures are highly visible, particularly in situations where the UN appears unable to act decisively due to divisions within the Security Council or resistance from member states.
So, what kind of Secretary – General does the UN need?
Looking across the more than 80-year history of the United Nations provides a more comprehensive framework for assessment. Different Secretaries-General have interpreted and exercised the role in varying ways, shaped by the geopolitical contexts of their tenures. Some have leaned into moral advocacy, using the platform to speak forcefully on global issues, while others have prioritized discreet diplomacy, working behind the scenes to broker agreements.
One of the most influential Secretaries-General was Dag Hammarskjöld, who redefined the office during the Cold War. Hammarskjöld believed the Secretary-General should act independently when global peace was threatened.
He used preventive diplomacy, quiet negotiations, and peacekeeping innovation to strengthen the UN’s global role. An example is during his leadership during the Suez Crisis, which demonstrated the value of strategic neutrality and moral authority. Even decades later, Hammarskjöld remains a model for proactive crisis leadership because he understood that international organizations require leaders willing to take political risks.
By contrast, some later Secretaries-General struggled under geopolitical pressure. Boutros Boutros-Ghali, for example, introduced ambitious reforms through his “Agenda for Peace,” which expanded peacekeeping and conflict prevention mechanisms. However, his confrontational relationship with major powers, particularly the United States, limited his effectiveness and contributed to his failure to secure a second term. Meanwhile, Kofi Annan demonstrated a different model of leadership built around diplomacy, coalition-building, and global development goals. Annan’s leadership helped advance debates on humanitarian intervention and institutional reform, though his tenure was also criticized for failing to prevent atrocities in Rwanda and Darfur. These contrasting examples show that the UN requires leaders who can balance independence with political pragmatism.
The current Secretary-General, António Guterres, has faced one of the most difficult periods in UN history. His tenure has coincided with the COVID-19 pandemic, worsening climate emergencies, and major wars that have divided the Security Council. The war in Ukraine, the humanitarian crisis in Gaza, and more recently, the war in Iran, have all punched a significant dent into the effectiveness of Guterres’s leadership and ability to quell crises diplomatically. On some tables, the fact that the UN hasn’t been a serious partner in negotiations has been damning. Analysts argue that geopolitical competition between powerful states has reduced the Secretary-General’s ability to mediate effectively, especially when permanent members of the Security Council are directly involved in conflicts. This reflects a deeper structural problem within the UN system: even the most capable leader cannot fully overcome institutional paralysis caused by veto politics.
It is clear that the role of the UN Secretary-General is shaped by the nature of the crises confronting the international system at any given time. As global challenges evolve, the expectations placed on the office also change. This means that the Secretary-General must possess a distinct set of leadership qualities and diplomatic skills specifically suited to addressing the complex political, economic, humanitarian, and environmental problems of the modern world.
First, the UN needs a leader with strong crisis communication skills. In an era shaped by misinformation and declining trust in institutions, the Secretary-General must be capable of framing global crises in ways that mobilize international action. A good reference is Guterres’s forceful climate rhetoric, which demonstrates how public advocacy can elevate neglected issues onto the global agenda.
Second, the UN requires a Secretary-General skilled in preventive diplomacy. Modern conflicts are increasingly complex, involving non-state actors, cyber warfare, economic coercion, and regional instability. A Secretary – General today must think not to wait for a crisis to unfold but to nip it in the bud before they manifest. Rather than reacting after conflicts explode, the UN must become more proactive. This is crucial to fixing the reputation of the UN.
Third, the next Secretary-General must prioritize institutional reform. Critics increasingly argue that the UN risks irrelevance if it cannot adapt to changing global realities. Reform efforts should include improving peacekeeping effectiveness, modernizing humanitarian coordination, increasing transparency, and addressing representation inequalities within the Security Council. A successful Secretary-General will not only manage crises but also strengthen the institution’s long-term legitimacy.
Most importantly, the UN needs a leader capable of combining moral authority with political realism. Idealism alone is insufficient in a fragmented international system, but pure pragmatism weakens the UN’s ethical foundation. The Secretary-General must therefore function as both diplomat and conscience of the international community, which means being willing to challenge powerful states when necessary while still maintaining enough political support to keep negotiations alive.
Leadership theory helps explain why this balance matters. Transformational leadership emphasizes vision, inspiration, and institutional change, while transactional leadership focuses on negotiation and strategic compromise. The future UN Secretary-General must combine both approaches. They must inspire global cooperation on issues like climate change and humanitarian protection while also navigating the harsh realities of international politics. In many ways, the role requires an unshaking balancing act.
Ultimately, the future of the United Nations depends not only on structural reform but on leadership capable of restoring trust in multilateralism. The world is entering an age defined by overlapping crises: environmental collapse, geopolitical fragmentation, technological disruption, and humanitarian instability. In such a world, the UN cannot afford passive leadership. It needs a Secretary-General who is courageous enough to speak truth to power, strategic enough to manage competing interests, and visionary enough to redefine global cooperation for a new era.
The UN was created to prevent a global catastrophe after World War II. Today, as international crises become more interconnected, unpredictable and even more far-reaching as before, the organization requires leadership that can adapt to history’s turning points. The Secretary-General the UN needs is one who would speak to peace not as a suggestion to be occasionally brushed aside, but as the representative of the World population insisting on peace at a table filled by raging world powers who want it otherwise.
Written by Olivier Noudjalbaye Dedingar, Global Peace Ambassador and USA/UN Correspondent.
