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General Studies I · Subtopic

World wars

Official syllabus

History of the world will include events from 18th century such as industrial revolution, world wars, redrawal of national boundaries, colonization, decolonization, political philosophies like communism, capitalism, socialism etc.— their forms and effect on the society.

UPSC CSE 2026 notification

What this covers

Treat the world wars as conflicts produced by interacting structural pressures, immediate crises, alliance choices, state decisions and mass mobilization. A complete account must distinguish the origins of each war, the expansion from regional crisis to wider conflict, the meaning of total war, and the effects of technology, economy, empire and civilian participation. Study peace settlements and post-war institutions as attempted solutions that also created new tensions. Link military outcomes to border change, political regime change, social transformation, anti-colonial movements and the reorganization of international power.

Key ideas

  • Long-term causes and immediate triggers
  • Alliance systems and escalation
  • Total war and mobilization
  • Technology economy and strategy
  • Civilian and colonial participation
  • Peace settlements
  • International institutions
  • Political social and territorial consequences

Connected topics

Official wording is from UPSC's Civil Services Examination 2026 notification, the current baseline for CSE 2027 preparation. Always check the latest notification at upsc.gov.in. Scopes and key ideas are CSE One's study map and are being expanded.