AP UNITED STATES HISTORY • PERIOD 7: 1890–1945

1920s: Cultural and Political Controversies

How modernization, migration, and competing visions of American identity produced explosive cultural conflicts during the Jazz Age.

Historical Context & Motivation

The 1920s are often remembered as the Roaring Twenties—a decade of economic prosperity, consumer culture, and cultural dynamism. Yet beneath the glittering surface of jazz clubs and automobile showrooms, the United States was riven by deep cultural and political controversies that reflected fundamental disagreements about the nation's identity. The decade's conflicts grew directly out of transformations set in motion during the Progressive Era and World War I: rapid urbanization, the Great Migration of African Americans to northern cities, mass immigration from southern and eastern Europe, and the diffusion of new technologies like radio and cinema that challenged parochial worldviews. These forces pitted urban, cosmopolitan America against rural, traditionalist America in a series of dramatic confrontations over religion, race, morality, and national belonging.

1919–1920
Red Scare & Palmer Raids
Postwar anxieties about Bolshevism and labor radicalism trigger mass arrests and deportations of suspected radicals, establishing a climate of nativist fear that persists through the decade.
1920
Prohibition & Women's Suffrage
The Eighteenth Amendment banning alcohol takes effect in January; the Nineteenth Amendment granting women the vote is ratified in August, marking major Progressive victories with lasting 1920s consequences.
1924
National Origins Act
Congress enacts the most restrictive immigration legislation in American history, imposing national-origin quotas designed to preserve the northern and western European character of the population.
1925
Scopes Trial
The prosecution of a Tennessee teacher for teaching evolution becomes a national spectacle symbolizing the clash between religious fundamentalism and secular modernism.
1925–1928
Peak of the Second KKK
The revived Ku Klux Klan reaches an estimated membership of 4–5 million, exerting political influence not only in the South but across the Midwest and West through campaigns against Catholics, Jews, immigrants, and African Americans.

Taken together, these events pose a central historical question: Why did the same decade that produced unprecedented cultural creativity also generate such intense backlash and repression? The answer lies in the collision between modernizing forces—urbanization, secularism, consumerism, and pluralism—and a powerful traditionalist reaction that sought to preserve an older, more homogeneous vision of American life. Understanding this tension is essential for the AP exam, where the 1920s serve as a pivotal case study in the recurring theme of American identity and the limits of pluralism.

Core Principles: The Fault Lines of the 1920s

The cultural and political controversies of the 1920s can be organized around several intersecting fault lines that structured public debate. Each fault line represented a deeper structural transformation in American society; none existed in isolation, and the most explosive controversies—like the Scopes Trial or the 1928 presidential election—sat at the intersection of multiple tensions simultaneously.

1

Urban vs. Rural America

The 1920 census revealed that, for the first time, a majority of Americans lived in urban areas. Cities represented modernity, diversity, and cultural experimentation, while rural communities increasingly felt marginalized and sought to reassert traditional values through legislation and social movements.
2

Nativism & Immigration Restriction

Decades of mass immigration from southern and eastern Europe provoked a nativist backlash rooted in pseudo-scientific racism, economic anxiety, and cultural chauvinism. The Emergency Quota Act of 1921 and the National Origins Act of 1924 codified these fears into federal law.
3

Fundamentalism vs. Modernism

Protestant fundamentalists rejected higher biblical criticism and Darwinian evolution, viewing them as threats to moral order. Modernists embraced science and secular education. The Scopes Trial of 1925 dramatized this schism for a national audience.
4

Racial Hierarchies & the Second KKK

The Great Migration intensified racial tensions in northern cities, while the revived Ku Klux Klan broadened its targets to include Catholics, Jews, and immigrants. White supremacy operated through both vigilante violence and mainstream political institutions.
5

Prohibition & Moral Reform

The Eighteenth Amendment represented the apex of Progressive-era moral reform, but its enforcement proved deeply divisive. Prohibition disproportionately targeted immigrant communities, fueled organized crime, and became a symbol of government overreach for urban Americans.
KEY TAKEAWAY
Think of 1920s America as a tectonic zone where multiple cultural plates—urban and rural, native-born and immigrant, secular and religious, white and Black—were grinding against one another. Each controversy was a different earthquake along the same fault system. The AP exam frequently asks you to connect these seemingly separate events to a single underlying tension between modernization and traditionalism, much as a geologist would trace distinct tremors back to the same subterranean pressure.

Visual Explanation: The Clash of Two Americas

This diagram contrasts the values, positions, movements, and political champions of urban-modernist and rural-traditionalist America. The dashed line represents the cultural fault line along which the decade's major flashpoints occurred.

The diagram above illustrates the fundamental dichotomy that structured 1920s cultural politics. On the left, urban and modernist Americans embraced pluralism, secular education, and the new consumer economy; on the right, rural and traditionalist Americans sought to defend Protestant moral authority, Anglo-Saxon demographic dominance, and small-town community norms. The key insight for AP analysis is that these were not merely cultural preferences but competing visions of national identity with concrete political consequences. Immigration restriction, anti-evolution laws, Prohibition enforcement, and Klan political organizing all represented attempts by one side to impose its vision through law and social coercion. Meanwhile, the Harlem Renaissance, the NAACP's legal strategy, and Al Smith's 1928 presidential campaign represented countervailing assertions of pluralist identity. Understanding this binary—while recognizing that many Americans occupied positions between these poles—is essential for constructing strong AP essays.

How the Controversies Worked: Mechanisms of Cultural Conflict

Immigration Restriction: From Anxiety to Legislation

The mechanism by which nativist sentiment became federal policy illustrates a pattern repeated across multiple 1920s controversies: cultural anxiety was translated into legislative action through the mobilization of interest groups, pseudo-scientific justifications, and appeals to national security. The Emergency Quota Act of 1921 set immigration quotas at 3% of each nationality's representation in the 1910 census, deliberately favoring northern and western Europeans. The National Origins Act of 1924 (also called the Johnson-Reed Act) tightened these quotas to 2% of each nationality's representation in the 1890 census—a baseline chosen specifically because it predated the peak of southern and eastern European immigration. The law also entirely barred immigration from Asia. Proponents drew upon the eugenics movement, citing works like Madison Grant's The Passing of the Great Race (1916) to argue that racial mixing would degrade American civilization. This pseudo-scientific racism lent an air of scholarly legitimacy to what was fundamentally a program of ethnic exclusion.

The Scopes Trial: Science, Religion, and the Courtroom

The Scopes Trial of 1925 operated through a different mechanism—a legal test case designed to challenge Tennessee's Butler Act, which prohibited teaching evolution in public schools. The ACLU recruited John Scopes, a high school teacher in Dayton, Tennessee, to deliberately violate the law so that its constitutionality could be challenged. The trial became a national media spectacle when William Jennings Bryan agreed to prosecute and Clarence Darrow defended Scopes. H. L. Mencken's acerbic reporting from Dayton framed the trial as a contest between enlightened modernity and backward provincialism. Although Scopes was convicted and fined $100, the trial exposed the intellectual vulnerabilities of the fundamentalist position when Darrow cross-examined Bryan on the literal truth of the Bible. The larger significance lay in how both sides used the courtroom as a proxy for a national argument about whether public education should serve secular or religious purposes—a debate that continues to resonate in American politics today.

Prohibition: The Noble Experiment's Unintended Consequences

The Eighteenth Amendment and the Volstead Act (1919) banned the manufacture, sale, and transportation of intoxicating liquors. Prohibition had roots in decades of Progressive-era temperance advocacy and drew support from an unlikely coalition: rural Protestants who viewed alcohol as sinful, women's groups who linked drinking to domestic violence, industrialists who wanted a sober workforce, and nativists who associated saloon culture with immigrant communities. In practice, enforcement was chronically underfunded—fewer than 1,500 federal agents patrolled the entire country. The result was the explosive growth of bootlegging, speakeasies, and organized crime syndicates led by figures like Al Capone. Prohibition thus became a powerful symbol of the gap between legislative moralism and social reality, and its eventual repeal via the Twenty-first Amendment in 1933 marked a definitive defeat for the coercive wing of the temperance movement.

The Second Ku Klux Klan: Mainstreaming White Supremacy

The second Ku Klux Klan, refounded in 1915 and inspired partly by D. W. Griffith's film The Birth of a Nation, differed from the Reconstruction-era Klan in important ways. Its membership extended far beyond the South into Indiana, Oregon, Colorado, and other states. Its targets included not only African Americans but also Catholics, Jews, immigrants, and anyone deemed a threat to "100% Americanism." The Klan operated through fraternal rituals, community organizing, and direct engagement in electoral politics—at its peak, Klan-backed candidates held governorships, Senate seats, and local offices across the country. Its decline after 1925 resulted not from a repudiation of its ideology but from internal scandals, particularly the conviction of Indiana Grand Dragon D. C. Stephenson for murder. The second Klan illustrates how white supremacy and nativism were not fringe phenomena but mainstream political forces in 1920s America.

Detailed Breakdown: Cultural Responses and Resistance

While traditionalist movements dominated much of the decade's political landscape, the 1920s also witnessed powerful cultural responses from those who challenged racial hierarchies, gender norms, and cultural conformity. These movements did not merely react to repression; they asserted new, affirmative visions of American identity that would shape the nation for decades to come.

This flowchart traces how modernization pressures generated three major cultural responses—the Harlem Renaissance, the New Woman movement, and the Lost Generation—each of which connected to broader organizations and left a lasting legacy for later reform movements.

The Harlem Renaissance

The Harlem Renaissance was a flowering of African American literature, music, art, and intellectual life centered in New York City's Harlem neighborhood during the 1920s. Writers like Langston Hughes and Zora Neale Hurston celebrated Black identity and experience, while jazz musicians like Duke Ellington and Louis Armstrong created an art form that transcended racial boundaries and redefined American popular culture. The movement was closely linked to the Great Migration—the relocation of hundreds of thousands of African Americans from the rural South to northern cities—which created new urban Black communities with sufficient density and economic resources to support cultural institutions. Separately, Marcus Garvey's Universal Negro Improvement Association (UNIA) promoted Black nationalism and pan-Africanism, attracting millions of followers and representing a more radical alternative to the NAACP's integrationist approach.

The New Woman and Changing Gender Roles

The ratification of the Nineteenth Amendment in 1920 symbolized the culmination of decades of suffrage activism, but the broader transformation of women's roles extended far beyond the ballot. The iconic flapper—with her bobbed hair, shorter skirts, and willingness to drink, smoke, and dance in public—represented a deliberate rejection of Victorian propriety. Margaret Sanger's campaign for birth control access challenged both legal restrictions and social taboos around female sexuality. The growth of women in the workforce—particularly in clerical, retail, and professional positions—further eroded traditional domestic expectations, though it is important to note that these changes were concentrated among white, middle-class, urban women and did not automatically translate into broader economic or political equality.

Worked Example: Analyzing a Primary Source on Immigration Restriction

📄 DOCUMENT EXCERPT
"America must be kept American. Biological laws tell us that certain divergent people will not mix or blend... The Nordics propagate themselves successfully. With other races, the outcome shows deterioration on both sides." — President Calvin Coolidge, 1924, in support of the National Origins Act
SAQ Analysis: Immigration Restriction in the 1920s
1
Step 1 — Identify the Historical ContextCoolidge's statement was made in 1924, during the passage of the National Origins Act. This law emerged from decades of anxiety over mass immigration from southern and eastern Europe, intensified by the post-WWI Red Scare and the rise of pseudo-scientific eugenics. The 1920 census had revealed that urban populations surpassed rural ones for the first time, and many native-born Americans attributed social instability to the presence of immigrants.
Context: Post-WWI nativism, eugenics movement, urban-rural tensions
2
Step 2 — Analyze the Author's Argument and PurposeCoolidge explicitly invokes "biological laws" and the concept of Nordic racial superiority to justify immigration restriction. His purpose is to provide a scientific-sounding rationale for exclusionary legislation, appealing to the widespread acceptance of eugenics among educated elites in the 1920s. By framing restriction as a matter of biological necessity rather than mere prejudice, Coolidge elevates nativism to the level of national policy and natural law.
Argument: Pseudo-scientific racism used to legitimize legal exclusion
3
Step 3 — Connect to Broader ThemesCoolidge's statement connects to the AP theme of American and National Identity (NAT). The debate over immigration was fundamentally a debate about who counted as "American." The National Origins Act codified a racial hierarchy into federal law, defining American identity in explicitly ethnic terms. This connects backward to anti-Chinese legislation (1882) and forward to debates over immigration reform that would not be resolved until the Hart-Celler Act of 1965. It also intersects with the broader 1920s pattern of using legislative power to enforce cultural conformity—visible in Prohibition, anti-evolution laws, and the Klan's political campaigns.
Theme connection: NAT—immigration restriction as racial definition of American identity

Comparing the Controversies: Patterns and Distinctions

Comparison of major 1920s controversies by position, alignment, and short-term outcome
ControversyTraditionalist PositionModernist PositionShort-Term Outcome
ImmigrationRestrict entry to preserve Anglo-Saxon character; eugenics justificationEmbrace pluralism; immigrants as economic and cultural assetsTraditionalist victory: National Origins Act (1924)
Evolution / ScopesBiblical literalism; ban Darwinism from schoolsAcademic freedom; science-based curriculumMixed: Scopes convicted, but fundamentalism publicly discredited
ProhibitionMoral imperative; alcohol as social evilPersonal liberty; Prohibition breeds crime and hypocrisyTraditionalist victory enacted but increasingly unenforceable
KKK / RaceWhite Protestant supremacy; "100% Americanism"Racial equality; NAACP anti-lynching campaignsKlan gains then collapses; structural racism persists
Election of 1928Anti-Catholic; Hoover as symbol of Protestant orderAl Smith as champion of urban, immigrant, Catholic AmericaTraditionalist victory: Hoover wins landslide
KEY TAKEAWAY
Notice a crucial pattern: in the short term, traditionalists won most of the legislative and electoral battles of the 1920s—Prohibition was the law, immigration was restricted, anti-evolution statutes passed in multiple states, and Hoover defeated Smith. Yet in the long run, the modernist side largely prevailed: Prohibition was repealed (1933), the Scopes verdict was symbolically overturned by the court of public opinion, immigration quotas were eventually abolished (1965), and the cultural pluralism championed by the Harlem Renaissance and the New Woman movement became defining features of American life. This pattern—where cultural backlash temporarily succeeds in law but fails to reverse underlying social transformations—is a powerful analytical framework for AP essays.

Connections to Broader Themes and Later Periods

The cultural and political controversies of the 1920s did not exist in a vacuum; they connected to longstanding patterns in American history and foreshadowed conflicts that would erupt again in later decades. Understanding these connections is critical for AP exam success, where questions frequently ask students to draw comparisons across periods.

1920s controversies in long-term historical perspective
1920s ControversyHistorical PrecedentLater Echo
Immigration restriction (1924)Chinese Exclusion Act (1882); nativist Know-Nothing movement (1850s)Hart-Celler Act (1965) abolishes quotas; ongoing immigration debates (21st century)
Scopes Trial / evolutionSecond Great Awakening (1830s–40s); conflict between faith and Enlightenment reasonEpperson v. Arkansas (1968); Kitzmiller v. Dover (2005) — intelligent design debates
ProhibitionTemperance movement (1830s–1900s); WCTU and Anti-Saloon League21st Amendment repeal (1933); "War on Drugs" (1970s–present) as parallel moral crusade
Second KKK / racial violenceReconstruction-era KKK; Jim Crow legislation (1890s)Civil Rights Movement (1950s–60s); white resistance to integration
Harlem RenaissanceAfrican American intellectual tradition: Frederick Douglass, Booker T. Washington, W.E.B. Du BoisBlack Arts Movement (1960s–70s); continued cultural assertion of Black identity

For the AP exam, the most productive connections involve the recurring AP themes of American and National Identity (NAT), Migration and Settlement (MIG), and Social Structures (SOC). The 1920s represent a critical inflection point where the forces of modernization became irreversible, even as traditionalist resistance achieved temporary legislative victories. The Great Depression and New Deal would soon shift the political landscape dramatically, but the cultural fault lines established in the 1920s—between secular and religious America, between racial inclusion and exclusion, between cosmopolitan pluralism and ethno-nationalist identity—remain recognizable features of American political life.

Practice Problems

1
Which of the following best explains why the National Origins Act of 1924 used the 1890 census rather than a more recent census as its baseline for immigration quotas?
2
The second Ku Klux Klan of the 1920s differed from the Reconstruction-era Klan primarily in that it
PROBLEM 3INTERMEDIATE
a) Briefly describe ONE cause of the cultural conflicts between urban and rural Americans in the 1920s. b) Briefly explain ONE specific example of how these cultural conflicts manifested in federal or state legislation during the 1920s. c) Briefly explain ONE way in which a cultural or intellectual movement of the 1920s challenged traditionalist values.
PROBLEM 4APPLIED
Use the following two documents and your knowledge of United States history to answer the question. Document 1: "If we believe that the greatest asset of the United States is the character of its people, then we must be vigilant to keep those gates narrowed to desirable types. The American stock is being diluted by a stream of alien blood." — Senator Albert Johnson (R-WA), Chairman of the House Committee on Immigration, 1924 Document 2: "I, too, sing America. I am the darker brother. They send me to eat in the kitchen When company comes, But I laugh, And eat well, And grow strong. Tomorrow, I'll be at the table When company comes." — Langston Hughes, "I, Too" (1926) Evaluate the extent to which cultural and political conflicts in the 1920s reflected competing definitions of American national identity.
PROBLEM 5CRITICAL THINKING
Evaluate the extent to which the cultural and political controversies of the 1920s represented a continuation of earlier conflicts in American history rather than a new phenomenon unique to the post-World War I era.

Summary: 1920s Cultural and Political Controversies

The 1920s were defined by a fundamental clash between modernization and traditionalism that produced explosive controversies across American society. Immigration restriction through the National Origins Act of 1924 codified eugenics-based nativism into federal law, while the Scopes Trial dramatized the battle between fundamentalism and secular modernism. Prohibition represented the zenith of Progressive-era moral reform but proved unenforceable, while the second Ku Klux Klan extended white supremacist and nativist politics into the mainstream. These traditionalist movements achieved significant legislative victories in the short term.

Yet the decade also witnessed powerful countercurrents. The Harlem Renaissance asserted African American cultural pride, the New Woman and flapper movements challenged Victorian gender norms, and the Lost Generation writers critiqued American materialism and conformity. The essential AP framework for this topic is recognizing that traditionalist backlash won the legislative battles but lost the long-term cultural war—a pattern of temporary resistance followed by the eventual triumph of modernization that recurs throughout American history and connects the 1920s to both earlier nativist movements and later struggles over civil rights, immigration, and cultural pluralism.

Varsity Tutors • AP United States History • 1920s: Cultural and Political Controversies