Unit 9: Period 9: 1980–PresentAP United States HistoryTimeline of key eventsThemes and big ideasKey figuresVocabularyUnit 9 topicsUnit 9 overview9.1Contextualizing Period 99.2Reagan and Conservatism9.3The End of the Cold War9.4A Changing Economy9.5Migration and Immigration in the 1990s and 2000s9.6Challenges of the 21st Century9.7Causation in Period 9← Previous8.9 The Great SocietyNext →9.1 Contextualizing Period 9Practice AP United States History questions →