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Multilateral Blocs: G20, BRICS, ASEAN, SCO, SAARC & BIMSTEC

Multilateral blocs and regional groupings form the structural framework of contemporary plurilateral diplomacy, bridging sovereign states across security coordination, economic integration, and development financing. The Group of Twenty (G20), founded in 1999 following the Asian financial crisis and elevated to heads-of-state summits in 2008, represents approximately 85 percent of global Gross Domestic Product and 75 percent of international trade. Operating without a permanent secretariat, the G20 functions through an annual rotating Troika leadership model. Under India's 2023 presidency themed "Vasudhaiva Kutumbakam," the New Delhi Leaders' Declaration achieved historic milestones by granting permanent membership to the African Union, launching the Global Biofuels Alliance, and establishing the India-Middle East-Europe Economic Corridor (IMEC) partnership.

Concurrently, the BRICS grouping—originating in 2006, holding its first formal summit at Yekaterinburg in 2009, and inducting South Africa in 2010—institutionalized South-South cooperation through the Shanghai-based New Development Bank (NDB) and the Contingent Reserve Arrangement (CRA). In January 2024, BRICS implemented a landmark expansion by admitting Egypt, Ethiopia, Iran, and the United Arab Emirates. In Southeast Asia, the Association of Southeast Asian Nations (ASEAN), established via the 1967 Bangkok Declaration with headquarters in Jakarta, anchors Indo-Pacific economic architecture through ASEAN Centrality and the Regional Comprehensive Economic Partnership (RCEP). In Eurasian security, the Shanghai Cooperation Organisation (SCO), founded in 2001 with its Secretariat in Beijing and the Regional Anti-Terrorist Structure (RATS) in Tashkent, expanded to admit India and Pakistan in 2017, Iran in 2023, and Belarus in 2024.

In South Asia, regional integration exhibits contrasting trajectories: the South Asian Association for Regional Cooperation (SAARC), founded at Dhaka in 1985 with its secretariat in Kathmandu, has remained operationally stalled due to persistent cross-border security impasses, prompting regional connectivity initiatives to shift toward the Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation (BIMSTEC). Established in 1997 with its secretariat in Dhaka, BIMSTEC connects five South Asian and two Southeast Asian littoral states. For UPSC CSE (GS Paper II - International Relations) and SSC CGL examinations, candidates must evaluate institutional governance structures, summit communiqués, consensus-based decision procedures, connectivity corridors, and the evolving geopolitical balance between Western-led multilateral formats and emerging Global South coalitions.
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Key Concepts & Self-Assessment15 Key Facts

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  1. #1
    The G20 inducted the 55-member African Union as a permanent member during the 18th G20 Heads of State Summit in New Delhi (2023).
  2. #2
    BRICS established the New Development Bank (NDB) with an initial authorized capital of USD 100 billion, headquartered in Shanghai, China.
  3. #3
    ASEAN was founded on 8 August 1967 through the Bangkok Declaration by Indonesia, Malaysia, the Philippines, Singapore, and Thailand.
  4. #4
    The Shanghai Cooperation Organisation (SCO) operates its permanent Secretariat in Beijing and the RATS counter-terrorist body in Tashkent.
  5. #5
    SAARC's Secretariat is located in Kathmandu (established 1987), whereas BIMSTEC's permanent Secretariat operates in Dhaka (operationalized 2014).
  6. #6
    The G20 operates without a permanent secretariat; governance is steered through the annual rotating G20 Presidency supported by a Troika consisting of the previous, current, and incoming host countries.
  7. #7
    BRICS announced a landmark membership expansion at the 15th Summit in Johannesburg in August 2023, welcoming Egypt, Ethiopia, Iran, and the United Arab Emirates as members starting January 2024.
  8. #8
    India and Pakistan formally joined the Shanghai Cooperation Organisation (SCO) as full member states at the Astana Summit in Kazakhstan in June 2017.
  9. #9
    The South Asian Association for Regional Cooperation (SAARC) was established on December 8, 1985, in Dhaka by seven founding member nations, later admitting Afghanistan in 2007.
  10. #10
    The Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation (BIMSTEC) was formed in June 1997 through the Bangkok Declaration, encompassing five South Asian and two Southeast Asian littoral states.
  11. #11
    ASEAN operates through ten Southeast Asian member states, maintaining its headquarters and Secretariat in Jakarta, Indonesia, led by an ASEAN Secretary-General.
  12. #12
    The Contingent Reserve Arrangement (CRA) was established by BRICS alongside the NDB under the Fortaleza Declaration in 2014 to provide mutual liquidity support against balance of payments pressures.
  13. #13
    The Indian Ocean Rim Association (IORA), established in March 1997, coordinates regional maritime safety and blue economy cooperation across 23 member states from its Secretariat in Ebene, Mauritius.
  14. #14
    The Regional Comprehensive Economic Partnership (RCEP), signed in November 2020 by 15 Asia-Pacific nations, created the world's largest free trade agreement, from which India withdrew in 2019 over tariff deficit concerns.
  15. #15
    The Quadrilateral Security Dialogue (Quad), revived in 2017, facilitates strategic maritime cooperation and infrastructure coordination among Australia, India, Japan, and the United States.

Subject Specialist Commentary

Analytical perspective & practical exam advice from the Master10 academic board

Educator's Insight
Multilateral groupings help countries collaborate on international trade, regional security, and development funding. While regional blocs like ASEAN and SAARC arose to encourage neighborly cooperation in Southeast and South Asia, larger economic groupings like the G20 and BRICS tackle worldwide financial challenges. Institutions like the New Development Bank, set up by BRICS in Shanghai, offer alternative development loans, showing how emerging economies work together on global platforms.
For UPSC prelims and SSC exams, headquarters and membership rosters are favorite question targets. A standard trap involves confusing secretariats: remember that the G20 has no permanent secretariat, SCO headquarters is in Beijing, SAARC is based in Kathmandu, and BIMSTEC operates from Dhaka. Also note that India and Pakistan joined SCO together in 2017, and the African Union became a permanent G20 member during the 2023 New Delhi summit. Revise recent member additions before your test.

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