Cold War: Refers to the period of political tension between the United States and Soviet Union after World War II. It heavily influenced Reagan's foreign policy decisions.
Trickle-down economics: A theory associated with Reaganomics, suggesting that by cutting taxes for wealthy individuals and businesses, economic benefits will trickle down to everyone else.
Soviet Union: The communist superpower that was a major rival to the United States during the Cold War. Reagan's presidency saw increased tensions between these two nations.