The United Nations General Assembly convened amid ongoing global tensions and varied international perspectives on the efficacy and purpose of the institution. Since 2017, the tenure of U.S. President Donald Trump has introduced a notably combative tone to the annual gatherings, marked by sharp rhetoric and unconventional statements challenging longstanding diplomatic norms.

Trump’s recent address included a direct threat to “annihilate the Islamic republic” if Iran failed to reach an agreement with the United States. This declaration, made during the assembly’s session, raised concerns internationally, although subsequent reports indicated that U.S. officials were engaging in dialogue with Iranian representatives, suggesting the statement may have been a negotiation tactic rather than an immediate policy shift. The message underscored a broader pattern of Trump’s administration prioritizing power politics and unilateral action over multilateral consensus. His open rejection of international law as a constraint—including the assertion that his own morality was the only limit on his decisions—has led to criticism that such positions undermine the foundational principles of the post-World War II international order.

Throughout its history, the United Nations has served primarily as a forum for preventing conflicts rather than directly resolving entrenched disputes. Its charter explicitly prohibits the threat or use of force against member states except in self-defense or with Security Council authorization. However, critics argue that frequent violations of this principle, including by permanent members of the Security Council, diminish its authority. The U.N. often becomes the venue for intractable problems precisely because traditional diplomacy has failed to resolve them.

An area of particular contention involves the International Criminal Court (ICC). The Trump administration declared the ICC’s activities as “illegitimate and baseless,” especially criticizing its investigations into the actions of the United States and Israel. In response, Washington imposed sanctions on the court’s chief prosecutor and several judges, including ICC President Tomoko Akane, and encouraged allied countries to follow suit. Nevertheless, Japan has declined to support such measures, maintaining its commitment to international justice mechanisms.

Regional security concerns have also drawn attention during the assembly. Japan’s Prime Minister Takaichi’s remarks last year, framing a potential crisis over Taiwan as a security issue for Tokyo that might trigger collective self-defense obligations alongside the United States, elicited sharp criticism from China. Beijing defended the retention of so-called “enemy state” clauses in the U.N. Charter—clauses originally aimed at preventing the resurgence of militarism following World War II—and characterized Japan’s stance as revisionist and threatening to regional peace. These clauses remain in force despite a 2005 agreement to remove them, reflecting ongoing geopolitical frictions and differing interpretations of security threats in East Asia.

Japan, for its part, emphasizes its commitment to a stable, rules-based international order and continues to advocate diplomatic patience and adherence to international norms. Given the accelerating pace of global change and rising tensions among major powers, Tokyo sees the U.N. as an essential platform for measured dialogue, fostering understanding and space for diplomatic innovation. While the institution faces criticism and challenges, its existence remains a central pillar of international cooperation and efforts to prevent conflict escalation worldwide.