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💻 Unit 9 · Period 9: Contemporary America 🗂 Flashcards 🗺 Cheat Sheet Essentials 🎙 Podcast 🎨 Visual Review 📝 MC Practice ✍️ SAQ Practice

AP US History Unit 9 Essentials

The must-know terms and big ideas for Unit 9: Period 9: Contemporary America (1980–Present). Every vocabulary word and concept you need to master.

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Big Idea 1
The Reagan Revolution reshaped American politics for decades
Reagan's 1980 election marked a fundamental shift in American politics — away from New Deal liberalism toward conservatism. Tax cuts, deregulation, and anti-government rhetoric became Republican orthodoxy, shifting the entire political spectrum rightward. Even Bill Clinton declared "the era of big government is over."
Conservatism Reagan Political Realignment
Big Idea 2
The end of the Cold War created new challenges rather than a "peace dividend"
The Soviet collapse left the US as the world's sole superpower — but 9/11 revealed the limits of that power. The wars in Afghanistan and Iraq proved that military dominance couldn't easily achieve political goals, and created the conditions for the instability and polarization that followed.
Cold War End Post-9/11 Foreign Policy
Big Idea 3
Contemporary polarization has deep historical roots
Today's political polarization isn't new — it reflects longstanding tensions over race, government's role, and economic inequality that run throughout American history. Understanding today's divisions requires understanding the backlash politics of the 1960s-70s, the Reagan Revolution, and the economic dislocations of globalization.
Polarization Historical Continuity Contemporary
Reagan Revolution
Conservative political shift beginning with Reagan's 1980 election; rejected New Deal liberalism for free markets, lower taxes, deregulation, and traditional values.
Reagan & Conservatism
Reaganomics
Reagan's supply-side ('trickle-down') economic policy: massive tax cuts, deregulation, reduced domestic spending, increased defense spending.
Reagan & Conservatism
Ronald Reagan
40th president (1981–89); shifted Republican Party toward ideological conservatism; oversaw Cold War's end and the Iran-Contra scandal.
Reagan & Conservatism
Moral Majority
Jerry Falwell's evangelical Christian political organization (1979); mobilized conservatives around abortion, gay rights, and secularism — key to Reagan's 1980 coalition.
Reagan & Conservatism
New Right
Late-1970s/1980s coalition combining evangelical Christians, anti-tax conservatives, anti-communists, and Sun Belt suburbanites — built the modern Republican Party.
Reagan & Conservatism
Iran-Contra Scandal
Reagan-era scandal: officials sold weapons to Iran despite embargo; profits funded Contra rebels in Nicaragua despite congressional ban; damaged Reagan's second term.
Reagan & Conservatism
Mikhail Gorbachev
Soviet leader (1985–91); his reforms — glasnost and perestroika — tried to save the USSR but accelerated its collapse; negotiated arms reductions with Reagan.
End of Cold War
Glasnost & Perestroika
Gorbachev's policies of openness (glasnost) and economic restructuring (perestroika); intended to revive the Soviet system but exposed its weaknesses.
End of Cold War
Fall of the Berlin Wall (1989)
Collapse of the wall dividing East and West Berlin; symbolized the end of Soviet control over Eastern Europe and the imminent end of the Cold War.
End of Cold War
End of the Cold War (1991)
Dissolution of the Soviet Union in December 1991; ended 45 years of U.S.-Soviet conflict; left the U.S. as the world's sole superpower.
End of Cold War
Globalization
Increased interconnection of national economies through trade, technology, and migration; accelerated by NAFTA (1994), the WTO (1995), and digital communication.
Changing Economy
NAFTA (1994)
North American Free Trade Agreement eliminating most trade barriers between U.S., Canada, and Mexico; boosted trade but accelerated outsourcing of manufacturing jobs.
Changing Economy
Digital Revolution
1990s–2000s rise of personal computing, the internet, mobile phones, and social media; transformed work, communication, and the economy.
Changing Economy
Great Recession (2008)
Severe financial crisis triggered by subprime mortgage collapse and bank failures; worst downturn since the Great Depression; led to TARP and Obama's stimulus.
Changing Economy
Rising Income Inequality
Post-1980 trend: real wages stagnated for working/middle classes while top incomes soared; union decline and outsourcing accelerated the gap.
Changing Economy
Immigration Act of 1965
Hart-Celler Act ending national-origin quotas favoring Europeans; opened the door for Latino and Asian immigration; transformed U.S. demographics.
Migration
Sun Belt Shift
Post-1970 population and economic shift from Northeast/Midwest ('Rust Belt') to South and Southwest ('Sun Belt'); drove conservative political realignment.
Migration
September 11 Attacks
Al-Qaeda hijacked four planes (2001), destroying the World Trade Center, damaging the Pentagon, and crashing in Pennsylvania; killed nearly 3,000; transformed U.S. foreign policy.
21st Century
War on Terror
U.S. global military/intelligence campaign after 9/11; invasions of Afghanistan (2001) and Iraq (2003); long-term occupations and continued debate over civil liberties.
21st Century
PATRIOT Act (2001)
Post-9/11 law expanding government surveillance and law-enforcement powers; controversial for civil liberties implications.
21st Century
Barack Obama
44th president (2009–17); first African American president; passed the Affordable Care Act; oversaw the killing of Osama bin Laden.
21st Century
Affordable Care Act (2010)
Obama's healthcare reform requiring insurance for most Americans, expanding Medicaid, banning denial for preexisting conditions; most significant healthcare expansion since Medicare.
21st Century
Obergefell v. Hodges (2015)
Supreme Court ruling that the Constitution guarantees same-sex marriage nationwide; capstone of a decade-long LGBT rights movement.
21st Century
Black Lives Matter
Civil rights movement formed in 2013 after George Zimmerman's acquittal; grew dramatically after the 2020 killing of George Floyd; demanded police reform and racial justice.
21st Century
COVID-19 Pandemic
Global coronavirus pandemic (2020+); over a million U.S. deaths; triggered economic shutdown, accelerated remote work, deepened political divisions over public health measures.
21st Century