Blocs at a Glance — G7, G20, BRICS, Commonwealth

Beyond SAARC, ASEAN, the EU, and the eurozone (already covered in their regional sections), four cross-cutting groupings recur constantly in current-affairs-adjacent GK questions. Unlike SAARC or the EU, none of these four is a fixed, closed membership list forever — G20 gained a permanent member as recently as 2023, and BRICS has grown twice in three years — so treat the exact roster as something to re-verify each exam cycle, even though the underlying logic of each grouping is stable.

The G7 (Group of Seven) is the oldest and most stable of the four: Canada, France, Germany, Italy, Japan, the United Kingdom, and the United States — seven advanced economies, unchanged in membership since Canada joined in 1976 (the European Union also attends as a non-enumerated participant). No emerging economy, including India, is a full G7 member, though India has been a regular invitee to G7 summits under the "outreach" or "guest country" format in recent years.

The G20 (Group of Twenty) is the G7 plus twelve more major economies plus the European Union — Argentina, Australia, Brazil, China, India, Indonesia, Mexico, Russia, Saudi Arabia, South Africa, South Korea, and Turkey, alongside the G7 seven and the EU. The African Union was admitted as a permanent G20 member in September 2023 (during India's own G20 presidency, held in New Delhi) — the single most-tested recent G20 fact for an Indian exam, since India chaired the summit at which this expansion happened. India previously hosted the G20 leaders' summit in September 2023 in New Delhi, its first as host nation.

BRICS began as an acronym for Brazil, Russia, India, China, and South Africa (South Africa joined in 2010, the other four having been grouped together from 2001/2006 onward) and has since expanded twice: Egypt, Ethiopia, Iran, and the United Arab Emirates joined as full members from January 2024, and Indonesia joined as a full member in January 2025 — bringing full membership to eleven countries as of this writing (Saudi Arabia was invited alongside the 2024 group but has not confirmed full membership, a genuinely unsettled detail worth flagging rather than stating definitively). BRICS has no permanent secretariat and rotates its chairmanship annually among members, unlike the G7 or G20's more institutionalised summit machinery.

The Commonwealth of Nations (55–56 members depending on the count at any given time) is a voluntary association of mostly former British colonies, headed symbolically by the British monarch as Head of the Commonwealth — a title that is not automatically hereditary and was specifically conferred by member agreement. Notable Commonwealth facts worth knowing: Rwanda and Mozambique are both Commonwealth members despite never having been British colonies (Mozambique was Portuguese, Rwanda was Belgian/German) — a favourite "which of these was never a British colony but is still in the Commonwealth" trap. The Maldives left the Commonwealth in 2016 and rejoined in 2020; Zimbabwe left in 2003 amid a diplomatic dispute and rejoined in 2023; Gabon and Togo (both former French colonies, again never British) joined in 2022, further loosening the "must have been a British colony" assumption. India remains a Commonwealth republic member, having chosen at independence to retain Commonwealth membership while becoming a republic rather than retaining the British monarch as head of state — the model other former colonies later followed.

Memory hook — "G7 is fixed, G20 just grew by one whole continent, BRICS keeps adding letters": G7's seven members haven't changed since 1976; G20 grew a genuinely new permanent member (the African Union) in 2023, during India's own presidency; BRICS has added six new full members across two rounds (2024, 2025) since its founding five — each bloc's stability is inversely related to how recently it's been in the news.

Practice Recall: Name the G7's seven members, the one permanent member the G20 gained in 2023 and under whose presidency, and the six countries that joined BRICS as full members in the 2024–25 expansion rounds.