AMSCO 8.8 End of the Cold War Notes

Overview

AMSCO Topic 8.8, "End of the Cold War" (AMSCO p. 608-623), explains how the nearly five-decade rivalry between the United States and the Soviet Union finally collapsed between 1985 and 1991. The chapter traces the path from 1970s détente, through the Soviet-Afghan War and the Reagan-era arms buildup, to Gorbachev's reforms and the fall of the Berlin Wall in 1989 and the dissolution of the Soviet Union in December 1991. It answers the chapter's essential question, "What caused the end of the Cold War?", and closes out the Cold War story that runs through Unit 8 (1900 to the present).

The big causal picture to hold onto: U.S. military and technological advances, the Soviet Union's costly failed invasion of Afghanistan, and public discontent plus economic weakness inside communist countries combined to end the Cold War. After 1991, only a few governments, including China, North Korea, Cuba, and Vietnam, still called themselves communist.

Détente: The Superpowers Relax (the 1970s)

Détente is a relaxation of strained relations between nations, and it defined U.S.-Soviet relations in the 1970s after the scary crises of the 1960s (the Bay of Pigs and the Cuban Missile Crisis). The two sides still mistrusted each other and still fought proxy wars, but they kept diplomatic channels open and started limiting nuclear weapons.

The signature moment came in 1972, when President Richard Nixon visited the Soviet Union and signed the Strategic Arms Limitation Treaty (SALT) with Soviet leader Leonid Brezhnev. SALT was designed to freeze the number of intercontinental ballistic missiles each power could keep. That same year, Nixon also visited communist China, the first visit ever by an American president, partly to play the two communist powers against each other.

Why did both sides want détente?

• The Soviet economy was in crisis. Central government controls kept farmers and manufacturers from deciding what to produce or what to charge, growth had stalled, and foreign trade was extremely limited.
• Eastern European Soviet bloc countries were pushing for reform and freedom from Moscow. The Soviet military had violently crushed the Prague Spring, a liberation movement in Czechoslovakia.
• The USSR was even skirmishing with China along their shared border, a sign of how troubled relations between the two communist giants had become.
• The U.S. was stuck in the costly, unpopular Vietnam War, and the American economy was struggling. Opening relations with China promised new markets and pressure on the Soviet-Chinese relationship, while détente helped the U.S. maintain containment with less risk.

One concrete payoff: the U.S. began selling excess American grain to the Soviet Union, where drought had created a shortage. American farmers got a huge new market, and Soviet citizens got food. Then in 1979 the Soviets invaded Afghanistan, President Jimmy Carter halted the grain shipments, and détente was over.

The Soviet-Afghan War (1979-1989)

The Soviet invasion of Afghanistan was meant to prop up Afghanistan's communist government against Muslim fighters, and it turned into a disaster that helped bring down the USSR. The human cost was staggering: estimates of Afghan civilian deaths range from 562,000 to two million, millions of Afghans fled to Pakistan and Iran, and many more became homeless inside the country.

Key points the AMSCO chapter stresses:

• The Soviet army could not defeat the guerrilla groups fighting in Afghanistan's rough terrain.
• Soviet legitimacy was undermined, and new forms of political participation developed in Afghanistan.
• The Soviet army withdrew in 1989, but a civil war continued in Afghanistan afterward.
• The war put immense stress on the Soviet Union's centralized economic system and left Soviet leadership vulnerable to reform. The USSR itself collapsed 12 years after the war began.

Think of Afghanistan as the Soviet Union's Vietnam: a long, unwinnable guerrilla war that drained money and credibility.

Reagan, Gorbachev, and the Thaw of the 1980s

Tensions actually spiked before they eased. During Ronald Reagan's presidency (1981-1989), the U.S. president called the Soviet Union the "evil empire" and sent military aid, including weapons, to the Afghans fighting Soviet forces. By the early 1980s, the two superpowers had more than 12,000 nuclear missiles pointed at each other, enough to destroy the world seven times over.

SDI ("Star Wars")

Reagan announced the Strategic Defense Initiative (SDI), a missile defense program critics nicknamed "Star Wars" after the 1977 film. The system would supposedly destroy any Soviet missiles aimed at the U.S. or its allies, leaving the Soviets with no equivalent shield. The Soviets saw SDI as the start of an arms race in space. It wasn't an immediate threat, but reform-minded Soviets worried about the long-term economic burden of competing with it, and it strengthened the hand of Soviet conservatives. The Soviets objected loudly. Meanwhile, non-aligned nations watched nervously, hoping the superpowers wouldn't trigger a nuclear holocaust.

Gorbachev's reforms and the INF Treaty

Mikhail Gorbachev, a more progressive Communist than previous Soviet leaders, came to power in 1985 and changed everything. He championed two policies you must know:

• Perestroika: restructuring the Soviet economy to allow elements of free enterprise.
• Glasnost: opening up Soviet society and the political process by granting greater freedom.

Reagan and Gorbachev met three times in two years, genuinely liked each other, and built a working relationship that delivered results. In 1987 the two countries signed the Intermediate-Range Nuclear Forces Treaty (INF), which restricted intermediate-range nuclear weapons. The INF and other U.S.-Soviet agreements quieted hardliners in both countries, which gave Gorbachev more room to push his political and economic reforms at home.

The End of the Soviet Union (1989-1991)

Gorbachev's reforms unintentionally unraveled the entire Soviet system. He ended economic support for the Soviet satellites in Eastern Europe and implied the Soviet army would no longer rescue communist regimes there. Once people in Eastern Europe got a small taste of freedom, they wanted more.

The dominoes fell fast:

• 1989: Democratic reform movements swept through Eastern European nations, and the Berlin Wall was torn down.
• October 1990: East and West Germany reunited as one country.
• 1990-1991: Soviet republics like Lithuania and Georgia began overthrowing their rulers and declaring independence. The Warsaw Pact dissolved.
• December 1991: A coup ousted Gorbachev, and the Soviet Union ceased to exist. Among the newly independent former Soviet republics, Russia emerged as the strongest. The Cold War was over.

The irony worth remembering: Gorbachev's reforms, designed to save the Soviet Union, ended up causing his own political downfall and the country's collapse.

The post-Cold War world

The end of a superpower brought both opportunities and challenges. Political alliances changed, economic interactions expanded, and the world became more interconnected than ever, producing greater wealth for some and hardship for others. The post-Cold War world faced new democracies, vast economic inequality, ethnic conflict and genocide, terrorism, environmental degradation, and global epidemics. These threads pick up in Unit 9.

Why the Cold War Ended (the exam answer)

If an exam question asks what caused the end of the Cold War, build your answer from three causes:

1. U.S. military and technological advances. Programs like SDI raised the cost of competing, which a stagnant Soviet economy couldn't afford.
2. The Soviet Union's costly, failed invasion of Afghanistan. A decade-long guerrilla war drained the centralized economy and shredded Soviet legitimacy.
3. Public discontent and economic weakness in communist countries. Stalled growth, food shortages, and reform movements in Eastern Europe (like the Prague Spring's legacy) meant the system was crumbling from within. Gorbachev's perestroika and glasnost opened the door, and people pushed through it.

This causation framing is exactly what the next chapter, AMSCO 8.9 on causation in the Cold War era, asks you to practice.

Key Terms to Know

Practice and Next Steps

Pair these notes with the Topic 8.8 End of the Cold War course study guide for the College Board framing of the same material, and browse the full AMSCO notes collection for the rest of Unit 8. If the origins of the conflict are fuzzy, back up to AMSCO 8.2 The Cold War notes before tackling its ending.

To check yourself, run Unit 8 multiple choice in guided practice, then try a causation prompt with FRQ practice and instant scoring. The end of the Cold War is a classic causation topic, so practicing "what caused X" arguments here pays off directly on the exam.