← Unit 2: The changing world order (1945 to 2010)
How was the postwar international order constructed between 1945 and 1949, and what were its central features?
The shaping of the postwar world, including the formation of the United Nations (1945), the Bretton Woods institutions, the start of the atomic age (Hiroshima and Nagasaki, August 1945), the beginning of the Cold War, and the start of decolonisation
A focused answer to the VCE Modern History Unit 2 key knowledge point on the shaping of the postwar world. The United Nations (June 1945), Bretton Woods (1944), the atomic age and Hiroshima / Nagasaki (August 1945), the emergence of the Cold War from the wartime alliance, and the start of European decolonisation (India 1947).
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What this dot point is asking
VCAA wants you to explain the features of the postwar international order established between 1945 and 1949, including international institutions (UN, IMF, World Bank), the start of the atomic age, the origins of the Cold War, and the beginning of decolonisation. The dot point is the foundation for understanding the second half of the 20th century.
The United Nations
The United Nations Charter was signed at San Francisco on 26 June 1945 (entry into force 24 October 1945) and the UN replaced the failed League of Nations. Key features:
Security Council. Five permanent members (USA, UK, USSR, France, Republic of China) with veto power, plus rotating non-permanent members. Authorised to use force; binding decisions.
General Assembly. All member states have one vote. Non-binding resolutions. Approves the budget.
Specialised agencies. WHO (health), UNESCO (education and culture), UNICEF (children), FAO (food and agriculture), ILO (labour), and many others.
International Court of Justice. Based at The Hague.
Limitations. Cold War vetoes in the Security Council blocked many actions. The Council was usually paralysed except where USSR boycotted (Korea 1950) or both superpowers agreed.
Bretton Woods institutions
The Bretton Woods Conference (1 to 22 July 1944) in New Hampshire designed the postwar economic order:
IMF (International Monetary Fund). Manages international monetary cooperation; lends to countries with balance-of-payments problems. 187 members today.
World Bank. Originally International Bank for Reconstruction and Development; lent for postwar reconstruction, then development.
GATT (General Agreement on Tariffs and Trade, 1947). Multilateral framework to reduce trade barriers. Replaced by the World Trade Organization (WTO, 1995).
Gold-dollar system. US dollar pegged to gold ($35 per ounce); other currencies pegged to the dollar. This worked until Nixon ended dollar-gold convertibility in 1971.
The atomic age
The United States developed atomic weapons under the Manhattan Project (1942-1945). Test at Trinity site (16 July 1945).
Hiroshima (6 August 1945): "Little Boy" uranium bomb. Approximately 70,000 to 80,000 killed immediately; many more died from radiation.
Nagasaki (9 August 1945): "Fat Man" plutonium bomb. Approximately 40,000 to 80,000 killed immediately.
Japan surrendered (15 August, formally 2 September 1945).
The Soviet Union tested its first atomic bomb on 29 August 1949. The US monopoly was over; the nuclear arms race began.
Cold War origins
The wartime alliance between USA and USSR was instrumental. Tensions emerged immediately after the war:
Yalta (February 1945) and Potsdam (July-August 1945). Allied leaders met to settle postwar Europe. Disputes over Polish elections and German reparations foreshadowed the breakdown.
Iron Curtain (1946). Churchill's "Iron Curtain" speech (5 March 1946) at Fulton, Missouri named the dividing line.
Truman Doctrine (12 March 1947). US committed to "supporting free peoples resisting subjugation".
Marshall Plan (June 1947). $13 billion in US aid to rebuild Europe. The USSR forbade Eastern European participation, sharpening the divide.
Berlin Blockade and Airlift (June 1948 to May 1949). Stalin blockaded West Berlin; the Western Allies airlifted supplies. The blockade ended; the West stood firm.
NATO (4 April 1949). Western military alliance. 12 founding members.
Two German states (1949). Federal Republic of Germany (West, 23 May) and German Democratic Republic (East, 7 October).
Decolonisation begins
European colonial empires began to dissolve after WWII. Factors:
- Colonial powers weakened by the war (especially Britain and France).
- Independence movements strengthened during the war.
- Two superpowers (USA and USSR) both ideologically opposed to European colonialism.
- The UN Charter included a principle of self-determination.
Early independence:
India and Pakistan (15 August 1947). British India partitioned into India (Hindu-majority) and Pakistan (Muslim-majority, with West and East Pakistan, later Bangladesh from 1971). Partition violence killed over 1 million; 14 million displaced.
Burma (4 January 1948), Sri Lanka (4 February 1948). Independence from Britain.
Indonesia (1945-1949). Sukarno declared independence (17 August 1945); Dutch fought until international pressure and military failure forced recognition (December 1949).
Israel (14 May 1948). Establishment of Israel in former Palestine Mandate. Immediate first Arab-Israeli War.
Continued decolonisation through 1950s and 1960s in Africa, the Caribbean, the Pacific. By 1980, most European colonies were independent.
Population and economy
The war's human cost (approximately 75 million dead globally, including 6 million Jews in the Holocaust) had immediate demographic effects. Postwar baby boom in many countries.
Economic reconstruction in Western Europe (aided by Marshall Plan), Japan (US occupation), and parts of Asia. By the 1950s, "Wirtschaftswunder" (German economic miracle), Japanese rapid growth, and US-led Western prosperity.
In one sentence
The postwar international order between 1945 and 1949 was built on the United Nations and Bretton Woods institutions (governance and economic frameworks), the atomic bombings of Hiroshima and Nagasaki (initiating the nuclear age), the rapid breakdown of the wartime alliance into the Cold War (containment, NATO, divided Germany), and the start of decolonisation (India and Pakistan, Indonesia, Israel); together these shaped the second half of the 20th century.
Past exam questions, worked
Real questions from past VCAA papers on this dot point, with our answer explainer.
Year 11 SAC10 marksExplain the features of the postwar international order established between 1945 and 1949.Show worked answer →
A Year 11 SAC.
Thesis. The postwar order, established between 1945 and 1949, was built on four foundations: international institutions (UN and Bretton Woods), the nuclear age (Hiroshima and Nagasaki), the emergence of the Cold War (containment and the Iron Curtain), and the beginning of decolonisation (India 1947).
International institutions.
United Nations: Charter signed 26 June 1945. Replaced the League. Security Council with five permanent members (USA, UK, USSR, France, China) holding vetoes. General Assembly; specialised agencies (WHO, UNESCO, UNICEF). Headquarters in New York.
Bretton Woods (July 1944): Set up the postwar economic order. IMF (currency stability), World Bank (reconstruction lending), GATT (later WTO, free trade). Dollar pegged to gold; other currencies pegged to dollar. The dollar became the world reserve currency.
Nuclear age.
Hiroshima (6 August 1945) and Nagasaki (9 August 1945): atomic bombs killed approximately 110,000 to 230,000 people immediately, ended the Pacific war, and demonstrated the new weapon. The USSR developed its own bomb by August 1949, beginning the nuclear arms race.
Cold War origins.
The wartime alliance broke down rapidly. Stalin imposed communist governments across Eastern Europe by 1948. Truman Doctrine (March 1947) and Marshall Plan (June 1947) institutionalised containment. NATO (April 1949) and the founding of West and East Germany (1949) entrenched the divide.
Decolonisation begins.
India and Pakistan (15 August 1947): partition of British India with massive violence; over 1 million dead. Independence of Burma (1948), Sri Lanka (1948), Indonesia (1949). The beginning of the European retreat from colonies that would continue for decades.
Markers reward the four-foundation structure, specific events with dates, and the framing of these as features of a new international order.
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