What changed and what stayed the same in the United States across the postwar decades, and how do you turn that into an argument?
Topic 8.15 Continuity and Change in Period 8: using the historical reasoning skill of continuity and change over time to analyze the postwar era.
A focused answer to AP US History Topic 8.15, teaching the historical reasoning skill of continuity and change over time through Period 8: what the postwar decades transformed (civil rights, the size of government, America's global role) and what persisted (the Cold War framework, inequality), and how to frame a continuity and change essay.
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What this topic is asking
Topic 8.15 asks you to use the historical reasoning skill of continuity and change over time to analyze Period 8. The exam wants you to identify what the postwar decades transformed, civil rights, the size of government, America's global role, and what persisted, above all the Cold War framework and enduring inequality, and to turn that contrast into an argument.
What continuity and change over time means
The great changes of the postwar era
Period 8 was an era of profound change:
- Civil rights. The movement dismantled legal segregation and won federal protection of voting, the greatest shift in race relations since Reconstruction.
- The size of government. The Great Society expanded federal responsibility for welfare, health, and education to its widest extent since the New Deal.
- America's global role. The United States took on permanent global leadership, a sharp break from the isolationism it had embraced after the First World War.
The stubborn continuities
Linking Period 8 forward
A strong continuity and change argument connects the period to what follows. The era's two defining trends, the expansion of the federal government and the wave of social and cultural upheaval, did not simply continue; they provoked a powerful reaction. The conservative backlash against the Great Society, the 1960s movements, and federal power, combined with the economic troubles and disillusionment of the 1970s, produced the conservative resurgence under Ronald Reagan that opens Period 9. Showing how the changes of one period generate the reaction of the next is a reliable route to the complexity point.
Worked example: framing a continuity and change essay
Try this
Q1. Name the Cold War strategy that guided American foreign policy continuously from 1945 through Vietnam. [Recall]
- Cue. Containment, a key continuity of the postwar era.
Q2. Explain why the persistence of racial inequality is a continuity even though legal segregation was dismantled. [Short explanation]
- Cue. The Civil Rights and Voting Rights Acts ended the legal structure of segregation and disfranchisement, but they did not eliminate de facto segregation in housing and schools, deep economic inequality, or discrimination in daily life; because these injustices endured beyond the legal changes, racial inequality remained a powerful continuity through and beyond the period.
Exam-style practice questions
Practice questions written in the style of College Board exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
AP USH (style)3 marksBriefly describe ONE major change in the United States between 1945 and 1980. Briefly explain ONE significant continuity across the same period. Briefly explain ONE way a development of the period shaped the era that followed.Show worked answer →
A Short Answer Question (SAQ), 3 points, one per bullet.
A. Describe: the civil rights movement dismantled the legal segregation that had governed the South since Reconstruction.
B. Continuity: the Cold War framework of containment guided American foreign policy throughout the period, from Korea to Vietnam.
C. After 1980: the conservative backlash against the Great Society and the 1960s movements shaped the Reagan era of Period 9.
Markers want a real change, a genuine continuity, and a concrete link forward.
AP USH (style)6 marksEvaluate the extent of change in the role of the federal government in the period 1945 to 1980.Show worked answer →
A Long Essay Question (LEQ), scored on the 6-point rubric, framed by continuity and change.
Thesis (1): "The role of the federal government expanded substantially in this period, through the Great Society and civil rights enforcement, though by the late 1970s a conservative reaction was beginning to challenge that expansion."
Contextualization (1): the New Deal legacy of an activist federal government.
Evidence (2): the Great Society's new programs and federal civil rights enforcement; the rising conservative backlash of the 1970s.
Analysis (2): explain HOW federal power grew and then met resistance, then add complexity by weighing the seeds of the conservative resurgence.
Related dot points
- Topic 8.1 Contextualizing Period 8: the Cold War, postwar prosperity, the civil rights movement, and the liberal and conservative currents that shaped the United States between 1945 and 1980.
Sets the scene for AP US History Period 8, covering the Cold War with the Soviet Union, postwar economic prosperity and the rise of the suburbs, the African American civil rights movement and the wave of social movements, the liberal Great Society, and how to write contextualization for a DBQ or LEQ on the postwar era.
- Topic 8.2 The Cold War from 1945 to 1980: the origins of the Cold War, the policy of containment, and the major confrontations of the superpower rivalry.
A focused answer to AP US History Topic 8.2, covering the Cold War from 1945 to 1980: the origins of the superpower rivalry, the policy of containment, the Truman Doctrine, Marshall Plan, and NATO, the Korean War, the Cuban Missile Crisis, and the shift toward detente.
- Topics 8.6 and 8.10 The Civil Rights Movement: the campaigns, leaders, and landmark victories of the African American struggle against segregation, and its limits and later turn toward Black Power.
A focused answer to AP US History Topics 8.6 and 8.10, covering the African American civil rights movement: Brown v. Board of Education, the Montgomery Bus Boycott, the sit-ins and marches, Martin Luther King and nonviolence, the Civil Rights and Voting Rights Acts, and the later turn toward Black Power.
- Topic 8.9 The Great Society: Lyndon Johnson's liberal reform program, its expansion of the federal government, and the conservative reaction it provoked.
A focused answer to AP US History Topic 8.9, covering the Great Society: Lyndon Johnson's War on Poverty and liberal reform program, the creation of Medicare and Medicaid, its achievements and limits, and the conservative backlash against the expansion of federal power.
- Topics 8.11 to 8.14 The Social and Cultural Movements: the wave of rights and reform movements of the 1960s and 1970s, the youth counterculture, environmentalism, and the political turn of the 1970s.
A focused answer to AP US History Topics 8.11 to 8.14, covering the social and cultural movements of the 1960s and 1970s: second-wave feminism and the ERA, the Latino and American Indian movements, the youth counterculture, the environmental movement, and the conservative shift of the 1970s.
Sources & how we know this
- AP United States History Course and Exam Description — College Board (2020)