UPSC Notes

International Law

PYQs

13

Articles

2

Momentum

33

Phase IFoundation

Background

Overview

UPSC frequently examines the role, challenges, and evolution of international legal frameworks in global governance, peace, and security. Understanding international law is crucial for analyzing India's foreign policy, its commitment to a rules-based international order, and its engagement with global issues.

International law is a system of rules, principles, and norms that govern the relations between states and other international actors. It aims to regulate state conduct, promote peace and stability, and address global challenges through a shared framework of expectations, forming the basis of the 'rules-based international order'.

Phase IIStatic core

Facts & tables

Key facts

Definition

A system of rules and norms governing relations between states and international actors.

Pillars

UN Charter (prohibition of force, sovereignty), UNCLOS (maritime law), Geneva Conventions (IHL), Human Rights Covenants.

Enforcement

Relies on consent, reciprocity, and collective mechanisms (e.g., UN Security Council, ICJ, ICC).

Current Challenge

Erosion of credibility due to widespread violations by powerful states, leading to impunity and weakening of the rules-based order.

Governing Principle

Governs relations between states based on rules and consensus, rather than solely on power dynamics.

State Justification

States, even during conflicts, invoke international law (e.g., UN Charter, sovereignty, self-defence) to justify their actions, indicating its continued relevance.

Daily Functionality

Facilitates daily global activities such as international aviation, maritime trade, diplomacy, communications, and travel.

Global Challenges & Cooperation

Indispensable for addressing transnational challenges like climate change, pandemics, and cyber-attacks, fostering cooperation through agreed rules.

Reference table

Key Branches of International Law

BranchPurpose/Key Instruments
Jus ad bellum (Use of Force)Regulates when states can use force; UN Charter (Art. 2(4))
Jus in bello (IHL)Regulates conduct during armed conflict; Geneva Conventions
Law of the SeaGoverns maritime activities; UNCLOS
Human Rights LawProtects individual rights; ICCPR, ICESCR
Environmental LawAddresses global environmental issues; Paris Agreement

Reference table

Perceived Failures vs. Quiet Successes of International Law

Perceived FailuresQuiet Successes
Inability to prevent major conflicts (e.g., Ukraine, Gaza)Facilitates international aviation and maritime trade
Structural limitations in institutions (e.g., UN Security Council)Enables diplomacy and international communications
Violations often dominate headlinesProvides framework for peace agreements and treaties (e.g., High Seas Treaty, Indus Waters Treaty)

Reference table

Static syllabus anchors

TypeReference
Conceptual areaInternational Relations

Reference table

Institutions & roles

BodyRole
United Nations Security CouncilEnforces/paralysed
International Criminal CourtAdjudicates/limited jurisdiction
Permanent Court of ArbitrationAdjudicates/rulings disregarded
United NationsPromotes and upholds
International Law CommissionDevelops and codifies
Phase IIIExam lens

Prelims angle

Overview

Prelims angle: Multi-statement analysis

Prelims angle: Factual recall

Quick revision

  • International law is a system of rules governing state relations, aiming for peace and stability.
  • Key pillars include the UN Charter (prohibition of force, sovereignty) and UNCLOS (maritime law).
  • Current challenges: widespread violations, impunity, paralysis of enforcement bodies (UNSC, ICC).
  • Erosion of the rules-based order leads to increased conflicts and global instability.
  • Reaffirming its value requires strengthening multilateral institutions and accountability.

Elimination traps

Body vs treatyDistinguish between international organizations (e.g., UN) and specific treaties (e.g., UNCLOS, Geneva Conventions).

Treaty = agreement between states; body = institution.

High-confidence PYQs

Topic timeline

International Relations

International law, ‘optional’ for powerful states

30 May 2026 · International law, the framework for global order, is facing significant erosion. Powerful states' violations of core principles (e.g., use of force, maritime law, human rights) with impunity, coupled with the paralysis of enforcement bodies, threaten the rules-based system, leading to increased instability and a return to power-based outcomes.

Read article

Do not write the obituary of international law yet

11 Aug 2026 · International law, despite facing challenges from ongoing conflicts and institutional limitations, remains a vital framework governing state relations, enabling cooperation, and providing a basis for dispute resolution and daily global activities. Its continued relevance is evident in states' justifications for actions and their reliance on treaties for global challenges.

Read article

Related topics

Practice writing on this topic

UPSC has asked 13 linked questions on International Law in Mains. Write an answer to one — and get it evaluated.

UPSC Prelims PYQs on International Law

Practice official previous year questions asked by UPSC related to this concept.

With reference to the United Nations Convention on the Law of Sea, consider the following statements: 1. A coastal state has the right to establish the bread...

2022·International Relations
Solve

Consider the following statements: Statement-I :Israel has established diplomatic relations with some Arab States. Statement-II :The 'Arab Peace Initiative...

2023·International Relations
Solve

With reference to the “United Nations Credentials Committee”, consider the following statements: 1. It is a committee set up by the UN Security Council and w...

2022·International Relations
Solve

With reference to the United Nations General Assembly, consider the following statements: 1. The UN General Assembly can grant observer status to the non-mem...

2022·International Relations
Solve

Consider the following UN organisations/agencies : 1. World Food Programme 2. United Nations Children's Fund 3. United Nations High Commissioner for Refugee...

2026·International Relations
Solve

Consider the following in respect of the Indian Ocean Naval Symposium (IONS): 1. Inaugural IONS was held in India in 2015 under the chairmanship of the Indi...

2017·International Relations
Solve

Which of the following international conventions have **not** been ratified by India? 1. Employment Policy Convention 2. Abolition of Forced Labour Conventi...

2026·International Relations
Solve

The Chancellor of the Federal Republic of Germany visited India in January, 2026. Which of the following is/are **not** correct in terms of outcomes of this ...

2026·International Relations
Solve

Consider the following statements: 1. The Nuclear Security Summits are periodically held under the aegis of the United Nations. 2. The International Panel o...

2017·International Relations
Solve

Consider the following pairs : Country | Reason for being in the news| |- | -| |1. Argentina | Worst economic crisis| |2. Sudan | War between the country's ...

2024·International Relations
Solve

The term "two-state solution" is sometimes mentioned in the news in the context of the affairs of -

2018·International Relations
Solve

Which one of the following statements best reflects the issue which Senkaku Islands, sometimes mentioned in the news?

2022·International Relations
Solve

Consider the following statements regarding the India-Africa Forum Summit (IAFS): 1. The summit held in 2015 marked the third edition of the IAFS. 2. The IAF...

2016·International Relations
Solve

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