Revision summary
Anarchy means no higher protector, so States must help themselves. Morgenthau defines interest as power; Carr rejects utopian reliance on opinion. Balance internally by arms and externally by alliances such as NATO. Defensive realists stop at security; offensive realists push toward hegemony. Regimes may help, but realists refuse to treat them as a substitute for capability.
Model answer
Copper italics in this answer — like this — are the key facts. Each one is unpacked in the Facts & figures rail.
Introduction
- Realists start from anarchy: no world government sits above the State. Survival is the first interest. The prescription is self-help, power, and careful alignment, not trust in law alone.
Body
Anarchy and survival
- Kenneth Waltz’s structural realism: the organising principle is anarchy, so States must provide their own security.
- Hans Morgenthau’s classical line: interest defined as power, prudence, and a balance that checks any would-be master.
- E. H. Carr warned against relying on liberal harmony while others arm.
The operational prescription
- Self-help: maintain armed forces, intelligence, and economic capacity that can be mobilised.
- Balance of power: internally by arms, externally by alliances. NATO is a realist instrument even when dressed as a community.
- Relative gains: watch partners who may convert cooperation into tomorrow’s threat, a reply to Robert Keohane’s more optimistic institutionalism.
- Nuclear deterrence for those who can, as Waltz also argued that nuclear bipolarity can stabilise.
- Defensive realists (Waltz) say seek enough security, not maximum empire. Offensive realists (John Mearsheimer) say regional hegemony is the safer peak. Both still prescribe power, not disarmament by example.
What realists tell States not to do
- Do not outsource survival to the UN Charter’s collective security when the veto can freeze it.
- Do not assume trade or a regime will bind a rising peer. China policy debates inside Asia follow this caution.
Limits inside the school
- The prescription can feed security dilemmas. One State’s survival kit is another’s threat.
- It under-describes domestic choice and the pull of institutions that Keohane maps in After Hegemony.
Flow diagram
flowchart TD A[Anarchy Waltz] --> SH[Self-help] SH --> B[Balance of power] B --> S[Survival] M[Morgenthau interest as power] --> S K[Keohane regimes] -.qualifies.-> S
Conclusion
The realist prescription in anarchy is self-help, a balance of power, attention to relative gains, and distrust of paper guarantees. Survival is ensured by capability and alignment, not by the harmony of interests. How much power is ‘enough’ divides Waltz from Mearsheimer.
Quick related
Students also ask
-
Russian-Ukraine crisis has cast a dark shadow on the energy needs of the member states of the European Union (EU). Comment
Next question on this syllabus topic (2022 · Q4(c)). View answer →
-
Do realists forbid diplomacy?
No. Diplomacy and alliances are tools of balancing. They forbid treating diplomacy as a replacement for power.
-
Is joining the UN against the prescription?
No. The UN is an arena. Realists use it and still keep a veto, nuclear arms, or alliances for the day the Council fails.
Same topic · past papers
UPSC has asked this before
These previous-year questions sit on the same topic. Open one to practise the earlier ask.
-
2022 · Q1(c) · PSIR GS 2 · 10 marks
Discuss the commonalities between the Marxist and Realist approach to the study of International Politics.
More from this topic
Q7(a) · UPSC Mains 2026 · PSIR GS 2 · 20 marks · Solution
How does illegal cross border migration pose challenges to India's security? Discuss the steps taken by the government in this direction and their effectiveness
Comparative Politics
Illegal cross-border migration undermines India's national security by altering demographic balances, straining economic resources, and exacerbating internal security vulnerabilities. The government has responded through border fencing, technological integration like SMART fencing, institutional mechanisms, and bilateral agreements. However, porous terrain, regional political complexities, and local connivance limit the complete effectiveness of these measures. A holistic approach combining strict border management with socio-economic development and robust legal frameworks is essential for sustainable containment.
Q5(d) · UPSC Mains 2026 · PSIR GS 2 · 10 marks · Solution
Discuss the main features of the land-boundary agreement between India and Bangladesh.
Comparative Politics
• Operationalized via the 100th Constitutional Amendment Act of 2015 to resolve Radcliffe Line anomalies. • Rooted in the unratified 1974 bilateral agreement and the 2011 additional protocol. • Involved the peaceful exchange of 111 Indian enclaves in Bangladesh and 51 Bangladeshi enclaves in India. • Granted affected residents the sovereign right to choose their nationality and place of residence. • Demarcated roughly 6.1 km of previously un-demarcated land boundaries to end administrative confusion. • Secured human rights and welfare access for over 50,000 formerly stateless enclave residents. • Reduced bilateral trust deficits, paving the way for deeper cooperation in security and connectivity.
Q4(c) · UPSC Mains 2026 · PSIR GS 2 · 15 marks · Solution
What is UNCLOS? Explain its salient features
Comparative Politics
UNCLOS, established in 1982, serves as the constitution of the oceans, codifying customary international law regarding maritime jurisdictions. Its salient features include distinct maritime zones ranging from territorial waters to the high seas, balancing coastal state sovereignty with freedom of navigation. It establishes compulsory dispute settlement mechanisms through institutions like ITLOS. The convention also mandates environmental protection and sustainable management of marine resources. For India, UNCLOS provides a rules-based order in the Indo-Pacific while respecting navigational rights. It remains central to addressing contemporary maritime security and resource challenges.