AP US History Unit 9: Period 9, 1980 to the Present
In a single generation, the United States went from a Cold War superpower locked in nuclear standoff with the Soviet Union to the central hub of a digital, globalized, and politically polarized world. Conservative ideas captured one major party and reshaped tax policy, the federal judiciary, and the relationship between citizens and government. Manufacturing employment collapsed while a service and information economy grew up in its place. Immigration patterns from Latin America and Asia remade the demographic map, and the September 11 attacks pulled the country into wars in Afghanistan and Iraq that defined the early twenty-first century. Period 9 is the unit that connects everything you have studied to the headlines you read today.
The 7 lessons in order
Contextualizing Period 9
The opening lesson. Frames the years from 1980 to the present as one connected story of conservative resurgence, the end of the Cold War, an information economy, and twenty-first-century challenges, and previews the forces that drive the next six lessons.
Reagan and Conservatism
The political and ideological turn that defined the decade. Supply-side tax policy, deregulation, the religious right, and the conservative legal movement that grew up around the Federalist Society and reshaped the federal judiciary.
The End of the Cold War
Reagan's defense buildup, the Reagan-Gorbachev arms-control diplomacy, the fall of the Berlin Wall in 1989, the collapse of the Soviet Union in 1991, and the Persian Gulf War as the first test of post-Cold War American military power.
A Changing Economy
The shift from manufacturing to services and information industries. NAFTA and the globalization of supply chains, the rise of personal computing and the internet, the dot-com cycle, the 2008 financial crisis, and the rising inequality that ran underneath all of it.
Migration and Immigration in the 1990s and 2000s
The Sun Belt's continued rise and the Rust Belt's contraction, the Immigration Reform and Control Act of 1986, the rapid growth of Latino and Asian American populations, and the political debates over border security, citizenship, and assimilation that followed.
Challenges of the 21st Century
The September 11 attacks and the global War on Terror, the wars in Afghanistan and Iraq, the USA PATRIOT Act and the surveillance state, the long expansion of civil rights into LGBTQ recognition, and the climate, pandemic, and polarization debates that frame contemporary politics.
Causation in Period 9
The closing lesson. Synthesis essay, full-period DBQ practice, and a graphic comparison of the United States in 1980 with the United States today, asking which of the conservative, economic, demographic, and foreign-policy shifts of Period 9 has done the most to shape the present.

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