Economy after 1945

By the end of this lesson, students will be able to:

• Account for the federal policies, consumer-demand pressures, and global economic conditions that produced sustained American prosperity from 1945 to 1973 (LO 8.D, WXT, KC-8.3.I.A).
• Explain how the GI Bill of 1944, the Federal-Aid Highway Act of 1956, and Federal Housing Administration mortgage insurance financed the postwar suburban building boom and expanded the American middle class.
• Trace the rise of mass-produced suburbs, beginning with Levittown in 1947, and account for the racially restrictive practices that limited Black access to the new housing stock.
• Account for the postwar internal migration that moved tens of millions of Americans out of central cities and into the suburbs, and out of the older industrial Northeast and Midwest into the Sun Belt (LO 8.E, MIG, KC-8.3.I.B).
• Evaluate the relationship between the postwar boom and persistent poverty by setting John Kenneth Galbraith's The Affluent Society (1958) against Michael Harrington's The Other America (1962).
• Use Skill 2.C (Causation) to construct a chain of causes connecting one postwar federal program to one specific demographic, economic, or political outcome of the period.

Between V-J Day in August 1945 and the OPEC oil embargo of October 1973, the American economy produced the broadest sustained increase in middle-class living standards in the country's history. Real gross national product roughly doubled. Median family income, measured in inflation-adjusted dollars, rose by more than seventy percent. Unemployment averaged less than five percent for most of the period. The United States, alone among the major industrial powers, came out of the war with its factories intact, and for nearly thirty years American manufacturers faced essentially no foreign competition while West Germany and Japan rebuilt. The dollar anchored the global financial order built at Bretton Woods. The CED organizes the story under Topic 8.4, and assigns it two Thematic Focus blocks (WXT for the economic transformation, MIG for the migration that the transformation produced) and two Learning Objectives (8.D and 8.E). Both objectives draw on a single Key Concept block, KC-8.3.I.A and KC-8.3.I.B (LO 8.D, LO 8.E).

Federal spending sat at the center of the boom. The Servicemen's Readjustment Act of 1944, popularly the GI Bill, paid for college tuition, vocational training, low-interest home loans, and unemployment benefits for the sixteen million returning World War II veterans. Roughly half used some part of the program. The college provisions doubled American higher-education enrollment within five years and turned the four-year college from an upper-class institution into a middle-class expectation. The home-loan provisions, paired with Federal Housing Administration mortgage insurance, financed a postwar building boom that pushed home ownership from a minority to a majority experience. Cold War defense contracts, accelerating after the outbreak of the Korean War in 1950, sustained whole regional economies. The interstate highway program, authorized by the Federal-Aid Highway Act of 1956 under President Dwight Eisenhower, committed roughly twenty-six billion dollars in federal funds to a forty-one-thousand-mile network of limited-access highways. Eisenhower justified the program on Cold War grounds, but its long-run effects were domestic and economic: the interstates accelerated suburbanization, hollowed out central business districts, and underwrote a new round of consumer spending on automobiles, motels, and roadside fast food (KC-8.3.I.A; LO 8.D).

The boom remade where Americans lived. Suburbanization is the single largest internal migration of the postwar period. By 1960, roughly half of all Americans lived in suburbs, up from a much smaller share in 1940. The pattern was set by Levittown, the first of three mass-produced developments built by Levitt and Sons starting in 1947 on a former Long Island potato field. William Levitt applied assembly-line construction methods to housing, broke each home into twenty-seven separate steps performed by specialized crews, and brought the price of a new two-bedroom house to roughly seven thousand dollars. The original Levitt deeds barred the sale of homes to Black families, a restriction Levitt defended publicly. Federal policy reinforced the pattern: the Federal Housing Administration's underwriting manuals, in use into the 1960s, treated racially mixed neighborhoods as financial risks and refused to insure mortgages in them, a practice known as redlining. The result was that the great federal subsidy of postwar middle-class wealth ran almost entirely to white families, and the suburban boom hardened residential segregation rather than softening it (KC-8.3.I.B; LO 8.E; MIG).

The second great postwar migration ran from the older industrial Northeast and Midwest, the so-called Rust Belt, to the southern and southwestern Sun Belt. The Sun Belt arc ran from Florida through Georgia, Texas, Arizona, and Nevada to southern California. Its growth had multiple causes: federal defense contracts concentrated aerospace and electronics work in California, Texas, and Georgia; the spread of residential air conditioning, which became affordable in the 1950s, made year-round Sun Belt living attractive to retirees; lower wages, weaker unions, and more permissive land-use rules drew manufacturing investment south and west; and the interstate highway network knit the region into a national market. Across the period, the Sun Belt's share of the American population, the federal payroll, and electoral college votes grew steadily. The political consequence is the conservative coalition that elected Richard Nixon in 1968, Ronald Reagan in 1980, and the Sun Belt presidents who followed (KC-8.3.I.B; LO 8.E; MIG).

The baby boom demographic surge of 1946 to 1964 added roughly seventy-six million Americans to the population. The boom reshaped schools, suburbs, consumer markets, and eventually the politics of every decade it passed through. New school construction ran at unprecedented levels through the 1950s. Toy companies, breakfast-cereal producers, and the new medium of children's television advertising organized themselves around the boom market. Television itself, which entered fewer than one in ten American homes in 1950, was in more than eight in ten by 1960. Supermarkets replaced corner grocers; shopping malls, served by the new highways, replaced downtown department stores; and franchised fast food, marked by the opening of Ray Kroc's first McDonald's franchise in 1955, became a national industry. Mass-market advertising, built around the new television networks, knitted the country into a more homogeneous consumer culture than it had ever known (KC-8.3.I.A; LO 8.D; WXT).

Labor relations took a distinctive postwar shape. After a wave of strikes in 1945 and 1946, the industrial unions and the largest manufacturers settled into what the economist Daniel Bell called a labor-management accord. The 1950 contract between General Motors and the United Auto Workers, called the Treaty of Detroit, set the pattern: a five-year contract, automatic cost-of-living wage increases tied to inflation, employer-paid health insurance, defined-benefit pensions, and broad management authority over the production process. Industrial unions accepted private-sector responsibility for delivering middle-class wages and benefits in exchange for labor peace. Union membership reached its historic peak at roughly thirty-five percent of the nonagricultural workforce in the early 1950s and stayed near that level through the early 1970s. The corporate sector concentrated in parallel: by the late 1960s, the two hundred largest American manufacturing firms produced roughly half of all manufacturing output. The postwar economy was, by any earlier measure, the most centralized in American history (KC-8.3.I.A; LO 8.D; WXT).

The boom did not reach everyone. John Kenneth Galbraith's 1958 book The Affluent Society argued that the United States had grown so rich in private goods that it now under-invested in public goods such as schools, parks, and urban infrastructure, and that Americans had not adjusted their political imagination to the new abundance. Four years later, the socialist writer Michael Harrington published The Other America, a short, plain-spoken book that estimated that roughly one in four Americans, between forty and fifty million people, lived below a reasonable poverty line and remained largely invisible to the new middle-class majority. Harrington's book is widely credited with shaping the early thinking of John Kennedy and Lyndon Johnson on poverty and with helping to produce the War on Poverty that the Great Society launched in 1964. The two books together capture the central paradox of the postwar economy: a country whose median family had never been better off was also a country in which forty million people lived in conditions the median family could no longer see (KC-8.3.I.A; LO 8.D).

By the early 1970s, the postwar engine was beginning to falter. West German and Japanese manufacturers had completed their reconstruction and were taking market share in steel, automobiles, and electronics. The Bretton Woods system collapsed in 1971 when President Nixon ended the dollar's convertibility into gold. The OPEC oil embargo of October 1973 produced gas lines, accelerating inflation, and the first sustained postwar recession. The set of mutually reinforcing conditions that had produced the boom (American manufacturing primacy, cheap energy, fixed exchange rates anchored on the dollar, and the labor-management accord) all began to unwind at once. Topic 8.4 closes the postwar boom story; Topics 8.13 and 8.14 take up what came next, including the energy crisis, deindustrialization, and the first cracks in the postwar liberal consensus that the boom had financed.

Four sources mark the legislative, the demographic, the cultural, and the dissenting bookends of the postwar economy. The first three illustrate Learning Objective 8.D (the economic transformation, WXT). The fourth ties LO 8.D to LO 8.E by documenting the population it left behind.

1. (Causation, LO 8.D) Construct a causal chain that begins with the GI Bill of 1944 and ends with the suburban majority documented in the 1960 census. Identify each step in the chain. At which step does federal policy do the most work, and at which step does private decision-making take over?
2. (Causation, LO 8.E) Account for the rise of the Sun Belt as a postwar destination. Rank federal defense spending, residential air conditioning, the interstate highway system, and weaker labor unions in order of causal weight. Defend your ranking with specific evidence.
3. (Comparison, LO 8.D and 8.E) Compare the postwar suburban migration with the simultaneous Black Great Migration into northern and western cities (Topic 8.6 and Lesson 6). What does the comparison reveal about how federal policy shaped two different migrations at the same time?
4. (Continuity and Change, LO 8.D) The Treaty of Detroit of 1950 set a new pattern for industrial labor relations. Identify two features of that pattern and account for why both unraveled by the late 1970s. What in the postwar arrangement made it durable for twenty-five years and fragile after that?
5. (Causation and Periodization) Galbraith's Affluent Society appeared in 1958 and Harrington's Other America in 1962. Account for the four-year shift in public attention from American abundance to American poverty. What changed in the country, in the books' authors, or in the audience that made Harrington's book land in the way Galbraith's book did not?

Draft alignment — pending educator review. AP USH codes correspond to the official College Board Course and Exam Description (Effective Fall 2023, Version 1). Statements below are paraphrased in the CountryReports voice; refer to the College Board's published CED for verbatim wording.