The relevance of the United Nations is a matter of ongoing debate rather than a settled fact, so let me share the main perspectives on this rather than search for something that doesn't have a single factual answer.
Arguments that the UN remains relevant:
•Universal legitimacy: It's the only forum where virtually every country in the world (193 member states) can engage in dialogue, making it indispensable for issues that require global coordination.
•Humanitarian and development work: Agencies like UNHCR, WFP, UNICEF, and WHO deliver aid, vaccines, food, and refugee support to hundreds of millions of people—work that continues regardless of Security Council gridlock.
•Peacekeeping: UN peacekeeping missions still operate in multiple conflict zones, and while imperfect, they remain a tool many states rely on.
•Norm-setting: Treaties, climate frameworks (like the Paris Agreement process), human rights mechanisms, and international law largely operate through or alongside UN structures.
•Crisis response platform: It provides a venue for emergency diplomacy even when it can't force outcomes.
Arguments that its relevance is diminished:
•Security Council paralysis: The five permanent members (US, UK, France, Russia, China) can veto action, which has repeatedly blocked meaningful response to major conflicts (Syria, Ukraine, and others).
•Enforcement problems: The UN has no independent military or police force; it depends on member states for enforcement, which often don't cooperate.
•Bureaucracy and inefficiency: Critics point to slow decision-making, budget disputes, and duplicated efforts across agencies.
•Great power politics: Major powers increasingly bypass the UN for coalitions, bilateral deals, or regional bodies when it suits them.
•Funding crises: The organization has faced significant budget shortfalls in recent years, forcing cuts to programs and staff.
My take:
The UN isn't "relevant" in a single, uniform sense—it's more accurate to say it's relevant for some functions and struggling in others. Its humanitarian, health, and development arms remain heavily used and hard to replace. Its political/security arm, especially the Security Council, is widely seen as increasingly hampered by geopolitical rivalry, especially since Russia's invasion of Ukraine and ongoing tensions with China and the US.
If you want, I can look into more specific recent developments—like current reform debates, funding cuts, or how the UN has handled a particular recent crisis—to give you a more concrete, up-to-date picture. Just let me know what angle interests you most.