An Impossible Job? The Succession of Guterres in a World Adrift
By Victor Ângelo
International Security Advisor and former UN Under-Secretary-General/ SRSG
Published: 17 April 2026
Within a few days, on the 21st and 22nd, the UN General Assembly will interrogate the vision and proposals of each candidate for the position of Secretary-General. António Guterres concludes his second and final mandate at the end of the year. Who will be his successor?
One candidate is Michelle Bachelet, who served as President of Chile twice—from 2006 to 2010 and 2014 to 2018. Bachelet can also claim significant experience within the United Nations. She held several roles and served as the High Commissioner for Human Rights until 2022. However, Human Rights is a highly sensitive field, where conflict with various offending States is frequent. Consequently, the American President and the newly inaugurated president of her own country do not view her candidacy favourably. Although she is, in my opinion, the most qualified candidate, she faces a virtually impossible challenge.
Rafael Grossi, the Argentine who has served as Director General of the International Atomic Energy Agency since 2019, is also in the race. Grossi gained visibility due to the crises surrounding nuclear power plants in Ukraine and Iran. His name is clearly associated with nuclear issues. He has demonstrated courage and initiative. The support of his country's president, Javier Milei—an eccentric who maintains a special relationship with Donald Trump and has moved closer to China (stating in Davos this year that China is a major trading partner)—will aid his candidacy. The problem may come from Moscow: Milei supports Ukraine, albeit with fluctuations dictated by his alignment with Washington. What impact might this position have on Grossi’s ambitions?
Rebeca Grynspan, the former Vice-President of Costa Rica (1994–1998), is also on the list of official candidates. Grynspan earned credit as one of the officials responsible for the negotiations between Ukraine and Russia regarding maritime security in the Black Sea. She is currently the Secretary-General of UNCTAD, the UN agency that seeks to promote international trade within a framework of sustainable development. She was recently in Baku for an international meeting annually promoted by the President of Azerbaijan, which gathers hundreds of figures active on the international stage. Afterwards, she travelled to Moscow, where she met with Sergey Lavrov. I am told the visit was cordial. However, Russian diplomacy is very shrewd and will only show its hand at the final moment.
Grynspan is, at the outset, the candidate with the greatest chance of success. In addition to her diplomatic qualities and her experience in the field of global economics, she hails from a country of little controversy and is a woman. Furthermore, there is an enormous political campaign in several influential circles pressuring for the election of a woman—an unprecedented feat.
Finally, we have Macky Sall, the former President of Senegal (2012–2024) and the African Union (2022–2023). In performing these roles, Sall demonstrated an ability to dialogue with the great powers independently, without geopolitical alignments. He is a moderate voice of the Global South. He faces, however, a major challenge: the geographic rotation of the Secretary-General position. According to this principle—an unwritten but decisive understanding—the next UN Secretary-General must come from the group of countries that constitute Latin America and the Caribbean. The only Secretary-General from that region was the Peruvian Javier Pérez de Cuéllar, who concluded his mandate on the last day of 1991. Thus, it is almost certain that Guterres will hand over his place to a Latin American or a Caribbean—and I am convinced these national designations should be written in the feminine.
We shall see how the hearings of 21 and 22 April unfold. The delegations present at the General Assembly are preparing to raise a wide range of questions. The most delicate will certainly be those linked to the reform of the United Nations, starting with the composition and representativeness of the Security Council. Clarifications will also be sought on how each candidate intends to deal with the veto-wielding States whenever they embark on clear violations of the UN Charter and International Law. This is an all too current issue. Great powers now shamelessly violate the principles and protocols that they themselves and the international community approved over the decades. They tear up the UN Charter when it suits them and protect client-States led by war criminals.
How can each candidate respond to such questions? It will not be easy.
The political dimension of the UN is undergoing a period of accelerated weakening and marginalisation. International relations have ceased to be aligned with the search for solutions to global problems. Today, as in a past thought never to return—prior to 1945—confrontations and wars of aggression matter more than diplomacy and solidarity between peoples. What can the Secretary-General do to reverse this trend?
Put another way: is there still political space for an organisation whose mission is the maintenance of peace between peoples? The answer lies in the various capitals across the world. It is not in the building in Manhattan, in the area known as Turtle Bay. Therefore, the new Secretary-General—be it one of the four mentioned above, or a "wild card" appearing at the final hour with the blessing of the five veto-wielding members—must be a "moving turtle." A pilgrim of peace in permanent transit between capitals. Direct contact with peoples and with the most diverse leaders, including those who pretend to believe in multilateralism, diplomacy, and respect for International Law: that is the master key to the rebirth of the United Nations.