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The Second World War (1941-45) did what a decade of the New Deal could not: it restored the American Dream of prosperity and full employment, and it made the United States the richest and most powerful nation on earth. Yet the same war that delivered abundance also exposed, more sharply than ever, the gap between the promise of the Dream and its reality for those it excluded. Americans were asked to fight fascism and racial tyranny abroad in the name of freedom and democracy — while at home a segregated army fought that war, 120,000 Japanese Americans were interned without evidence of disloyalty, and women who filled the factories were expected to surrender their jobs when the men returned. For this breadth study the war is the great accelerator: it completes the recovery the New Deal began, consolidates the United States as a global superpower, and arms the coming civil rights movement with the unanswerable contradiction between America's professed ideals and its practice.
For the Edexcel course, the war advances all four threads at once. Economically it ends the Depression and creates the affluence of the coming decades; in terms of government it drives the largest expansion of federal and presidential power in the period; for the American people it raises the expectations of African Americans, women and other groups while exposing them to fresh injustice; and for the Dream itself it poses the defining question of the twentieth century — whether a nation that had become the "arsenal of democracy" could extend democracy's promise to all its own citizens. The analytical task is to hold two truths together: that the war made America stronger, richer and more powerful than any nation in history, and that it simultaneously laid bare the exclusions at the heart of the Dream.
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This lesson belongs to Edexcel 9HI0 Paper 1, Option 1F (Route F): "In search of the American Dream: the USA, c1917-96" — a breadth study assessed by extended analytical essays and by the evaluation of historians' interpretations. Within our own teaching sequence it stands at the centre of the course, linking the New Deal state (Lesson 2) to the post-war affluence (Lesson 4) and the civil rights movement (Lesson 5) that the war did so much to seed.
Because Paper 1 is a breadth paper, examiners reward command of change over time and judgements that range across the period. Keep asking how the war altered both the reach of American prosperity and the boundaries of American citizenship. (For precise assessment weightings and question wording, always consult the official Edexcel specification and sample assessment materials rather than any paraphrase.)
American foreign policy in the 1930s was dominated by isolationism — the conviction, reinforced by disillusionment with the First World War, that the United States should avoid European entanglements. Successive Neutrality Acts (1935, 1936, 1937) prohibited arms sales and loans to belligerents, the last adding a "cash-and-carry" provision, while the Nye Committee (1934-36) blamed intervention in 1917 on the "merchants of death". Roosevelt moved the country toward intervention by stages: the Quarantine Speech (1937), the cash-and-carry revision (1939), the Destroyers-for-Bases Agreement (1940), the Lend-Lease Act (March 1941, under which some $50 billion in aid flowed chiefly to Britain and the Soviet Union), and the Atlantic Charter (August 1941), a joint statement of war aims emphasising self-determination. The Arsenal of Democracy was Roosevelt's phrase (December 1940) for America's role as chief supplier to the Allies — a role already casting the war as a defence of freedom, and thereby raising, at home, the question of freedom's limits.
The Japanese attack on Pearl Harbor (7 December 1941) killed 2,403 Americans and unified a divided nation overnight. Roosevelt's description of it as "a date which will live in infamy" framed the war as a response to unprovoked aggression; Congress declared war on Japan on 8 December with a single dissenting vote (Jeannette Rankin of Montana), and Germany and Italy declared war on the US on 11 December. The historian John Dower, in War Without Mercy (1986), argues that the Pacific war was shaped by mutual racial dehumanisation — a dimension the European theatre lacked, and one that helps explain the eventual willingness to use atomic weapons against Japan.
Mobilisation achieved what the New Deal could not: full employment and complete recovery. This is the pivotal economic fact of the course, because the affluence of the post-war decades — the mass prosperity in which the American Dream seemed, for a time, to be realised — was built on the industrial expansion of the war.
| Indicator | 1940 | 1945 |
|---|---|---|
| Unemployment | 14.6 per cent | 1.2 per cent |
| GDP | $101 billion | $214 billion |
| Federal spending | $9 billion | $98 billion |
| National debt | $43 billion | $259 billion |
The federal government directed the economy through agencies such as the War Production Board (which allocated raw materials and converted civilian industry to military output) and the Office of Price Administration (which managed rationing and price controls). American industry produced some 296,000 aircraft, 86,000 tanks, 6,500 naval vessels and 64,000 landing craft; Henry Kaiser's shipyards built a Liberty Ship in as little as four and a half days, and Ford's Willow Run plant produced a B-24 bomber roughly every hour at peak. The scale of wartime spending — the deficit spending the New Deal's critics had resisted — vindicated the argument that sustained government demand could produce full employment. In restoring prosperity, the war also restored the Dream's material foundation, but on a scale and with a permanence the 1920s boom had never possessed.
The war also redistributed opportunity geographically. Federal contracts poured into the South and, above all, the West: California, Texas and the Pacific Northwest boomed as shipyards, aircraft plants and military bases drew millions of migrants in search of work. This wartime "Sunbelt" boom began the great demographic and economic shift southward and westward that would reshape the map of American prosperity over the following decades. Farm income more than doubled as demand and prices recovered, lifting the rural population that had been trapped in depression since the 1920s. For a study of the American Dream, the war's economic significance is therefore not merely that it restored prosperity but that it broadened its base: mobilisation drew previously excluded regions and rural Americans into the boom, and — through wartime employment in Northern and Western industry — drew millions of African Americans off the land and into the industrial economy, however unequal their treatment within it.
The war drove the single largest expansion of federal authority and spending in the period, building on the New Deal and creating the national-security state. Federal spending rose more than tenfold; millions were conscripted; the economy was planned and rationed from Washington; and the presidency accumulated powers in foreign and military affairs that would persist through the Cold War as the "imperial presidency". For the course's second thread this is decisive: the war entrenched the enlarged federal government the New Deal had begun, and made big government a permanent feature of American life. Wartime diplomacy — the demand for unconditional surrender at Casablanca (1943), the agreements at Yalta (February 1945), and the fracturing alliance at Potsdam (July-August 1945) — set the geometry of the post-war world and the coming Cold War, extending American power onto a global stage.
The war dramatically expanded women's participation in the workforce, and for a study of the American Dream it opened, and then partly closed, a door to opportunity. Roughly 6 million women entered the workforce, many in industrial jobs previously reserved for men; "Rosie the Riveter" became the iconic image of their contribution, and around 350,000 women served in the military (the WAC, WAVES, WASP and Marines Women's Reserve).
| Advance | Limitation |
|---|---|
| Women entered skilled industrial jobs | Paid less than men for comparable work (roughly 65 per cent of male wages) |
| Proved capable in every role assigned | Faced hostility from male co-workers and unions |
| Gained economic independence | After the war, many were pressured or forced to surrender jobs to returning veterans |
| Wartime nurseries provided childcare | Most closed once the war ended |
The historian Ronald Takaki, in Double Victory (2000), emphasises that the war raised women's expectations and planted seeds for the later feminist movement, even as post-war realities pushed many back into domestic roles. This is the war's characteristic pattern for the Dream: it enlarged opportunity in fact, then narrowed it again in peace — but the memory of the enlargement did not fade.
For African Americans the war crystallised the contradiction between fighting fascism abroad and enduring racism at home. The Double V Campaign — launched by the Pittsburgh Courier in 1942 — demanded victory over the Axis abroad and over racial discrimination in America. This was the American Dream turned into a weapon: African Americans seized the rhetoric of a war for freedom to press their own claim to full citizenship.
Wartime gains were real but partial. A. Philip Randolph threatened a March on Washington in 1941, prompting Roosevelt to issue Executive Order 8802, banning racial discrimination in defence industries and creating the Fair Employment Practices Committee (FEPC). About 1 million African Americans served (in segregated units); the Tuskegee Airmen compiled a distinguished record; and the Great Migration accelerated, as roughly 1.5 million African Americans moved from the South to Northern and Western cities during the war years — a demographic shift that would reshape post-war politics. Yet discrimination persisted: the military remained segregated throughout the war (desegregation came only with Truman's Executive Order 9981 in 1948), race riots erupted in Detroit and Harlem in 1943, and defence industries resisted hiring Black workers despite Executive Order 8802. The war's most important legacy for the Dream was this: it armed a movement. The contradiction between the war's stated ideals and the treatment of African Americans became the moral engine of the post-war civil rights struggle.
In February 1942 Roosevelt signed Executive Order 9066, authorising the forced relocation and internment of roughly 120,000 Japanese Americans — two-thirds of them American citizens — from the West Coast to inland camps, given as little as 48 hours to dispose of homes, businesses and possessions. The internment was driven by racial prejudice, wartime hysteria and economic opportunism; there was no evidence of disloyalty, and the all-Nisei 442nd Regimental Combat Team became the most decorated unit of its size in US military history. The Supreme Court upheld internment in Korematsu v. United States (1944), now widely regarded as one of its worst decisions; the government did not formally apologise until the Civil Liberties Act of 1988, which provided reparations to survivors. The historian Roger Daniels has documented how the internment exposed the fragility of constitutional rights in wartime and the particular vulnerability of minorities. For a study of the American Dream, internment is the starkest wartime case of exclusion: American citizens were stripped of liberty and property on the basis of ancestry alone, in a war fought against racial tyranny.
The Manhattan Project (1942-45), led by the physicist J. Robert Oppenheimer, developed the atomic bomb at a cost of around $2 billion, first tested at Trinity (Alamogordo, New Mexico) on 16 July 1945. President Harry Truman, who succeeded Roosevelt after his death on 12 April 1945, authorised its use against Hiroshima (6 August, some 80,000 killed immediately and around 140,000 dead by the end of 1945) and Nagasaki (9 August, some 40,000 killed immediately and around 70,000 dead by year's end); Japan surrendered on 15 August (formal surrender 2 September). The decision remains among the most debated in modern history:
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