First Principles IASlearning from first principles

The Second World War and a new world order

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.
As of
October 2026
  • Treaty of Versailles
  • Great Depression
  • appeasement
  • Munich Agreement
  • Nazi Soviet Pact
  • Operation Barbarossa
  • Stalingrad
  • D Day
  • Holocaust
  • Oder Neisse line
  • 38th parallel
  • United Nations
  • Bretton Woods
  • GATT
  • Bengal famine
  • Indian National Army

The first principle

The Second World War grew out of an unfinished peace. The settlement of 1919 punished Germany without permanently weakening it, the Great Depression destroyed faith in democracy, and the states that wanted to overturn the order met no united resistance until it was too late. The war then destroyed the old order itself: Europe lost its primacy, two superpowers took its place, and the victors built new institutions, the United Nations (UN) and the Bretton Woods system, meant to prevent another such collapse. From the Security Council veto to divided Korea, today's world still carries the shape of 1945.

The core

Why war came

  • Versailles, 1919. Germany lost territory and all its colonies, was limited to an army of 100,000, had the Rhineland demilitarised and accepted war guilt and reparations. Germans saw it as a dictated peace, a ready grievance for nationalists.
  • The Great Depression, 1929. Unemployment in Germany rose to about six million by 1932, and voters turned to extremes; Hitler became Chancellor in January 1933. In Japan the slump strengthened the army's case for an empire.
  • Aggression by the revisionist powers. Japan seized Manchuria in 1931, Italy invaded Abyssinia in 1935 and Germany rearmed openly. The League of Nations condemned but could not act, because Britain and France would not risk war and the United States (US) was not a member.
  • Appeasement. Britain and France let Hitler remilitarise the Rhineland (1936), annex Austria (1938) and take the Sudetenland at Munich (September 1938). They hoped to satisfy him and gain time to rearm, but when Germany took the rest of Czechoslovakia in March 1939 the policy collapsed and Britain guaranteed Poland.
  • The Nazi Soviet Pact, August 1939. Stalin, distrusting the West after Munich, signed a non aggression pact with a secret protocol dividing Poland and the Baltic region. It freed Hitler from the risk of a two front war.
Cause and effect chain from the Treaty of Versailles to the outbreak of war in 1939From Versailles to war, 1919 to19391Versailles 1919 humiliates Germany:war guilt, reparations, lost land2Great Depression 1929 brings massunemployment and kills faith indemocracy3Hitler, Mussolini and Japanesemilitarists rise on promises ofrevenge and expansion4League of Nations fails overManchuria 1931 and Abyssinia 19355Appeasement: Rhineland 1936, Austriaand Munich 1938, Czechoslovakia 19396Nazi Soviet Pact, August 1939, freesHitler from a two front war7Germany invades Poland, 1 September1939; Britain and France declare war
Figure: How each step from 1919 to 1939 made the next one easier.

The course in brief

  • Germany invaded Poland on 1 September 1939, and Britain and France declared war. In 1940 Germany overran Denmark, Norway, the Low Countries and France, but lost the Battle of Britain in the air.
  • In June 1941 Hitler launched Operation Barbarossa against the Soviet Union. In December 1941 Japan attacked Pearl Harbor, bringing the US into the war and making it truly global.
  • The tide turned in 1942 to 1943 at Midway in the Pacific, El Alamein in North Africa and above all at Stalingrad, where a German army surrendered in February 1943.
  • The Allies landed in Normandy on D Day, 6 June 1944, while the Red Army advanced from the East; Germany surrendered in May 1945. The US dropped atomic bombs on Hiroshima (6 August) and Nagasaki (9 August), and Japan surrendered in August 1945.
World map of the Axis powers, the areas they occupied and the Allies around 1942, with five turning pointsAxis and Allies around 1942 12345Axis core:Germany, Italy,JapanAxis partners andannexed or puppetstatesOccupied or ruledby the AxisAllies (mainpowers anddominions)1Poland invaded, September 19392Stalingrad, 1942 to 1943: German advancebroken3Normandy, D Day, June 19444Pearl Harbor, December 1941: US entersthe war5Hiroshima and Nagasaki, August 1945Uncoloured: neutral states and colonialterritories. Shown on present day borders.
Figure: Axis, occupied and Allied states around 1942, approximate and shown on present day borders, with five turning points of the war.

The Holocaust

Nazi Germany deliberately murdered about six million Jews, roughly two thirds of Europe's Jews, along with Roma, disabled people, Soviet prisoners of war and others. After the Wannsee Conference of January 1942, killing moved from mass shootings to industrial murder in death camps such as Auschwitz Birkenau and Treblinka; it was genocide planned by a modern state.

Dimensions

  • Political. Fascism was discredited, and democracy was rebuilt in West Germany, Italy and Japan under Allied occupation. Communism gained prestige from the Soviet victory and spread to Eastern Europe and, in 1949, China.
  • Redrawal of boundaries. Germany was divided into four occupation zones, which became West and East Germany in 1949. Poland was shifted west: the Soviet Union kept eastern Poland, and Poland received German land up to the Oder Neisse line, with millions of Germans expelled. Korea was divided at the 38th parallel between Soviet and US forces, and two rival states emerged in 1948.
  • Economic. Europe was ruined and in debt, while the US produced roughly half the world's manufactured goods in 1945 and so designed the new economic order.
  • International. Power passed from Europe to the US and the Union of Soviet Socialist Republics (USSR). Their quarrel over Germany became the Cold War, and the exhausted colonial powers could no longer hold their empires.
  • Moral and legal. The Nuremberg trials (1945 to 1946) established that leaders are personally liable for crimes against peace and humanity, followed by the Genocide Convention and the Universal Declaration of Human Rights in 1948.
Europe after 1945 with present day countries coloured by Western and Soviet bloc, showing the divided GermanyEurope after 1945: the IronCurtain 1234StettinStettinTriesteTriesteWestWestSoviet blocSoviet blocWestern blocSoviet Union andits satellitesDivided oroccupied (Germany,Austria) andTito's YugoslaviaNeutral1Berlin: inside the Soviet zone, itselfsplit four ways2Poland moved west: lost land to theUSSR, gained German land up to the OderNeisse3Austria: occupied till 1955, thenneutral4Yugoslavia: communist, but broke withStalin in 1948The Iron Curtain is the line where tealmeets gold and grey.
Figure: Europe divided after 1945, approximate and shown on present day borders; the Iron Curtain runs where the Western bloc meets the Soviet bloc.

In practice

The new institutions

  • United Nations. The Charter was signed at San Francisco in June 1945 and came into force on 24 October 1945 with 51 members, India among them. Unlike the League, it gave the five great powers permanent seats and a veto, to keep them inside the system.
  • Bretton Woods, July 1944. The conference created the International Monetary Fund (IMF), to keep exchange rates stable and lend for balance of payments problems, and the International Bank for Reconstruction and Development (IBRD), the World Bank, to finance reconstruction and later development.
  • General Agreement on Tariffs and Trade (GATT), 1947. It aimed to avoid the tariff wars of the 1930s through negotiated rounds; India was one of its 23 founding members, and it gave way to the World Trade Organization (WTO) in 1995.
Table of the institutions of the post war order, with year and purposeThe new world order: institutionsof 1944 to 1947InstitutionYearPurposeUnitedNations1945Collective security;Security Councilwith five permanentmembers and a vetoInternationalMonetary Fund1944Fixed but adjustableexchange rates;short term loans forbalance of paymentsWorld Bank(IBRD)1944Loans forreconstruction,later fordevelopmentGATT1947Cut tariffs throughrounds of talks; WTOfrom 1995The victors wrote the rules: the veto andIMF voting by quota still reflect 1945.
Figure: The main institutions of the post war order and what each was for.

India in the war

  • The Viceroy declared India at war in September 1939 without consulting Indian leaders, and the Congress ministries resigned in protest. After the failure of the Cripps Mission (March 1942), the Congress launched the Quit India movement on 8 August 1942, while Japan stood at India's eastern frontier.
  • The British Indian Army grew to about 2.5 million, the largest volunteer army in history, and fought in North Africa, Italy and Burma.
  • The Bengal famine of 1943 killed between 1.5 million, the estimate of the official Famine Inquiry Commission, and about 3 million people. Wartime inflation, the loss of Burmese rice, hoarding and a slow official response turned scarcity into catastrophe.
  • Subhas Chandra Bose led the Indian National Army (INA) from Singapore in 1943, and it fought alongside Japan at Imphal and Kohima in 1944. The INA trials at the Red Fort in 1945 and the naval mutiny of 1946 showed that Britain could no longer rely on Indian soldiers.
Stat tiles on the human cost of the Second World War and India's part in itThe cost of the war, and India'sshare70 million+people killedworldwide, most ofthem civilians6 millionJews murdered inthe Holocaust2.5 millionIndians in theBritish IndianArmy by 1945, allvolunteersup to 3 mdeaths in theBengal famine of1943; officialestimate 1.5million51founding membersof the UnitedNations, 1945193members of theUnited NationstodaySource: Norman Lowe, Mastering Modern WorldHistory; United States Holocaust MemorialMuseum; Commonwealth War Graves Commission;Famine Inquiry Commission, 1945; UnitedNations.
Figure: The human cost of the war, India's share, and the growth of the United Nations. Source: Norman Lowe, Mastering Modern World History; United States Holocaust Memorial Museum; Commonwealth War Graves Commission; Famine Inquiry Commission, 1945; United Nations.

Issues and way forward

  • Hitler's war or everyone's failure? A J P Taylor (1961) saw Hitler as an opportunist exploiting others' weakness; Hugh Trevor Roper saw a long planned drive for living space in the East. Most now see a clear aim, made achievable by others' errors.
  • Was appeasement wrong? Its defenders point to British public opinion and the need to rearm; its critics argue that firmness in 1936 or 1938 could have stopped Germany more cheaply.
  • The atomic bombs. One view holds they ended the war quickly and saved lives; another holds Japan was close to surrender and the bombs were also a signal to the USSR.
  • An order frozen in 1945. The veto and IMF voting shares still reflect the victors of 1945. India, with Brazil, Germany and Japan (the G4), seeks permanent Security Council seats, and developing countries seek quota reform of the Bretton Woods bodies.

Common confusions

  • Treaty of Versailles 1919 and Munich Agreement 1938. Versailles was the peace that ended the First World War; Munich was the deal that handed the Sudetenland to Germany.
  • Yalta and Potsdam. Yalta (February 1945) brought together Roosevelt, Churchill and Stalin on zones and the UN; Potsdam (July 1945) settled Germany's occupation and Poland's western border, with Truman for the US and Attlee replacing Churchill midway through.
  • IMF and World Bank. The IMF deals with currencies and short term balance of payments problems; the World Bank lends for long term projects.

For the exam

  • Keyword bank: war guilt, reparations, appeasement, Munich, Nazi Soviet Pact, Barbarossa, Stalingrad, D Day, Holocaust, Oder Neisse line, 38th parallel, veto, Bretton Woods, GATT, Bengal famine, Indian National Army.
  • Previous year questions: Practise the previous year questions on this topic →
  • Use in an answer:
    • Introduction (data): The Second World War killed more than 70 million people, most of them civilians, and left Europe so weakened that within three decades nearly all its empires were gone.
    • Introduction (judgement, quote or report): The Preamble of the UN Charter opens with the resolve "to save succeeding generations from the scourge of war", which sums up why the victors of 1945 built a new world order.
    • Conclusion: The war ended Europe's primacy and created a world of superpowers, new nations and new institutions, many of which still frame international politics.
    • Conclusion: Reforming the order of 1945, especially the Security Council, so that it reflects today's world is the unfinished business of the peace.