The United Nations operates through several principal organs and specialized agencies. This article covers their structure and mandates.
✊ Must Know
The UN’s Principal Organs and the General Assembly
- The five organsThe UN’s principal organs include the General Assembly, Security Council, Economic and Social Council, Secretariat, and International Court of Justice.
- The General AssemblyThe General Assembly is the UN’s main deliberative body, where every member state gets an equal vote.
- Why that mattersThis equal-vote structure differs sharply from the Security Council, where five permanent members hold veto power.
The ICJ Settles Disputes Between States, and INTERPOL vs. the ICJ: Two Very Different Jobs
- StoryThe International Court of Justice (ICJ) settles legal disputes between states. It has 15 judges, each serving a nine-year term, and sits at the Peace Palace in The Hague.
- AlsoIt gives advisory opinions on international law when asked.
- A real caseIndia took Pakistan to the ICJ in 2017, in the Kulbhushan Jadhav case, over the treatment of an Indian national under a bilateral treaty. In 2019, the Court ruled 15-1 in India’s favour on a stay of execution.
- Why that example fitsEven though the case concerned one person, the actual dispute at the ICJ was between two states, India and Pakistan, over a treaty violation, not a criminal trial of an individual.
- StoryINTERPOL facilitates international police cooperation, across 196 member countries, mainly through Red Notices, international alerts for wanted individuals.
- WhyThis is distinct from the ICJ, which handles disputes between states, not individual criminal cases. A Red Notice is also not an arrest warrant; it is only an alert asking other countries’ police to act.
💡 Good to Know
The IAEA’s Dual Mandate and Specialized Agencies
- The IAEA’s roleThe International Atomic Energy Agency (IAEA) promotes peaceful nuclear technology use, while also monitoring compliance with non-proliferation commitments.
- Specialized agenciesThe UN’s specialized agencies, like the World Health Organization or UNESCO, each have their own specific technical mandate.
- Why it mattersThis is distinct from the UN’s political organs, like the Assembly or Council, which set broad policy rather than run technical programmes.
Two Very Different Decision-Making Logics
- MechanismThe General Assembly’s equal-vote structure contrasts sharply with the Security Council’s permanent-member veto power.
- WhyThis creates two very different decision-making logics, within the same organization.
🎯 Exam Point of View
CDS (II) 2023: Who’s Missing From the Permanent Five
- QuestionCDS asked which country is NOT a permanent member of the UN Security Council.
- AnswerThe answer is Japan.
- WhyThe Security Council has five permanent members: the USA, UK, France, Russia, and China. Japan has long sought a permanent seat but remains a non-permanent member at most, exactly the distinction this article’s own Must Know card draws.
- LinkSource: CDS (II) 2023, General Knowledge, Q78.
NDA (I) 2018: The Country Behind India’s ICJ Rival, and UPSC CSP 2020: Why Only Some Indian Reactors Are Under IAEA Safeguards
- QuestionNDA asked which country nominated Christopher Greenwood, the candidate India’s Dalveer Bhandari beat for a seat on the ICJ.
- AnswerThe answer is Britain (the UK).
- WhyBhandari and Greenwood were locked in a rare deadlock across 11 rounds of voting in 2017. Greenwood withdrew, and Bhandari won the General Assembly’s support decisively, leaving the UK without a judge on the ICJ for the first time in the court’s history.
- LinkSource: NDA & NA (I) 2018, General Ability Test, Q148.
- QuestionUPSC asked why some Indian nuclear reactors are kept under IAEA Safeguards while others are not.
- AnswerThe answer is that some use imported uranium and others use domestic supplies.
- WhyReactors running on imported uranium fall under IAEA safeguards. Those running on domestic uranium stay outside international safeguards, following India’s own separation of its civilian and military nuclear facilities. See SciTech0022 — Nuclear Reactors of India.
- LinkSource: UPSC CSP 2020, General Studies Paper I, Q55.
✅ Test Yourself
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🌟 Great to Know
The UN’s Structure Is a Deliberate Compromise
- MechanismThe UN’s structural design reflects a deliberate compromise. The General Assembly’s equal-vote system honours the principle of sovereign equality among states.
- WhyThe Security Council’s more concentrated power reflects a different practical reality: a handful of powerful states needed a stronger role, to make the organization workable at its founding.
The IAEA’s Real Internal Tension
- MechanismThe IAEA’s dual role creates a genuine internal tension. It promotes peaceful nuclear technology, while also monitoring non-proliferation.
- WhyThe same agency that helps countries build nuclear capacity is also responsible for verifying that capacity isn’t misused. This requires it to balance a promotional and a policing function at once.
UNOPS, and Why the INTERPOL/ICJ Distinction Matters
- UNOPSUNOPS, the UN’s own infrastructure and procurement arm, is a distinct subsidiary organ, neither a principal organ nor a specialized agency. See IntlRel0104 — UNOPS and UN Funds, Programmes and Subsidiary Bodies.
- Why precise labels matterDistinguishing INTERPOL from the ICJ matters conceptually, not just as trivia.
- The real distinctionINTERPOL handles operational police cooperation against individual criminals. The ICJ handles legal disputes between sovereign states.
- Why it mattersConfusing the two misunderstands how international law actually separates individual accountability from state-to-state legal disputes.
📰 Current Affairs
18 Years of UNSC Reform Talks, Still No Result
- 18 years, no resultThe UN General Assembly rolled Security Council reform negotiations into its 81st session in September 2026, the 18th year running with no concrete outcome.
- India’s positionOn 21 February 2026, India’s representative said global patience had run out, and called any proposed “third category” of seats a delay tactic.
- The G4 proposalIndia, with Brazil, Germany, and Japan, backs expanding the Council from 15 to around 25-26 seats, adding six new permanent members.
- SourceAll India Radio News, February 2026.
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