AP World History: Modern
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🌍ap world history: modern review

8.8 End of the Cold War

Verified for the 2025 AP World History: Modern examCitation:

The Cold War, a decades-long geopolitical struggle between the United States and the Soviet Union, came to an end with the collapse of the Soviet Union in 1991. A combination of internal economic stagnation, costly foreign interventions, technological disparity, and increasing popular resistance contributed to the downfall of communist regimes across Eastern Europe and the end of the bipolar world order.

The Cold War Begins to Thaw

By the 1980s, the strain of Cold War competition—militarily, politically, and economically—was becoming unsustainable for the Soviet Union. The United States, under Ronald Reagan, sharply increased defense spending and took a more aggressive anti-communist stance, including initiatives like the Strategic Defense Initiative (also known as “Star Wars”).

U.S. Military and Technological Superiority

The United States held a decisive advantage in technological innovation and military capability by the late Cold War period:

  • Massive investments in nuclear weapons, intercontinental ballistic missiles (ICBMs), and satellite surveillance allowed the U.S. to deter Soviet expansion.
  • American advances in space technology—exemplified by the Apollo missions and the Strategic Defense Initiative—further emphasized the Soviet Union’s lagging infrastructure and innovation.

This arms race placed immense pressure on the Soviet economy, which was already struggling with inefficiency and stagnation.


The Soviet-Afghan War and Its Consequences

In 1979, the Soviet Union invaded Afghanistan to prop up a faltering communist government. The invasion proved to be one of the most costly mistakes in Soviet foreign policy.

  • Afghan resistance fighters, known as the mujahideen, waged a prolonged guerrilla war against Soviet forces.
  • The conflict became a Cold War proxy war, with the United States, Pakistan, and Saudi Arabia supporting the mujahideen.
  • The war lasted until 1989, costing the USSR billions of dollars, thousands of lives, and global credibility.

⭐ The Soviet invasion of Afghanistan has often been referred to as "the USSR’s Vietnam"—a drawn-out conflict that drained resources and eroded public trust in the government.


Gorbachev's Reforms and the Decline of Soviet Authority

When Mikhail Gorbachev became General Secretary in 1985, he introduced sweeping reforms to revitalize the Soviet Union.

Perestroika and Glasnost

  • Perestroika (restructuring) aimed to decentralize the economy by introducing limited market mechanisms and reducing government control over production.
  • Glasnost (openness) encouraged freedom of expression, freedom of the press, and political transparency.

These policies had unintended consequences:

  • Citizens and satellite states used newfound liberties to demand more radical reforms and even independence.
  • The Communist Party's monopoly on power weakened, and nationalist movements surged across Eastern Europe and Central Asia.

The Fall of Eastern Bloc Regimes

By 1989, a wave of revolutions swept through Eastern Europe:

  • Communist regimes in Poland, East Germany, Czechoslovakia, Romania, and Hungary collapsed, largely without Soviet intervention.
  • The Berlin Wall, the most prominent symbol of Cold War division, was torn down in November 1989 after weeks of mass protests.

These events signaled the end of Soviet dominance in the region and marked a decisive turn in the Cold War.


The Collapse of the Soviet Union (1991)

Despite reform efforts, Gorbachev faced mounting pressure from both conservatives and reformists. In 1991, a failed coup by hardline communists accelerated the disintegration of Soviet authority.

  • Economic crisis, food shortages, and inflation led to widespread unrest.
  • Soviet republics, emboldened by glasnost, began declaring independence.
  • In December 1991, the Soviet Union formally dissolved, ending nearly 70 years of communist rule.

The Russian Federation emerged as the USSR’s successor, with Boris Yeltsin elected as its first president.


Diplomacy and Arms Reduction

The end of the Cold War was also marked by diplomatic progress between the United States and the USSR.

Treaty/AgreementYearKey TermsSignificance
INF Treaty1987Eliminated short- and medium-range nuclear missilesFirst treaty to reduce—not just limit—nuclear weapons
Strategic Arms Reduction Treaty (START I)1991Cut long-range nuclear arsenals by 25-30%Symbolized end of Cold War tensions
Reunification of Germany1990East and West Germany formally unified under NATO termsEnded decades of division; symbolized Cold War’s end

These agreements reflected mutual recognition that the arms race had become unsustainable and that cooperation was essential for global stability.

Source: Britannica

Key Terms to Review (16)

Atom Bombs: Atom bombs, or atomic bombs, are explosive devices that derive their destructive power from nuclear reactions, either fission or fusion. The development and use of atom bombs marked a significant turning point in warfare and international relations, especially during the Cold War era, as they symbolized the immense destructive potential of nuclear weapons and shaped the dynamics between superpowers in the struggle for influence and control.
Baltic to Eastern Europe to Central Asia: This term refers to a geographic and cultural continuum stretching from the Baltic Sea region in Northern Europe, through Eastern Europe, and extending into Central Asia. This area has experienced significant political, social, and economic changes, especially during the period marked by the end of the Cold War, which reshaped alliances, borders, and national identities across these regions.
Berlin Wall: The Berlin Wall was a concrete barrier that divided East and West Berlin from 1961 to 1989, symbolizing the Cold War's division of Europe into communist and capitalist spheres. Its construction marked a physical representation of the ideological struggle between the Soviet Union and Western powers, while its fall became a powerful emblem of the end of the Cold War and the reunification of Germany.
Boris Yeltsin: Boris Yeltsin was the first President of the Russian Federation, serving from 1991 to 1999, and is known for his role in the dissolution of the Soviet Union and the transition towards a market economy. His leadership during a tumultuous period marked the end of Communist rule in Russia and the emergence of a new political landscape, which included significant social and economic reforms.
Communist Party: The Communist Party is a political party that advocates for the principles of communism, which emphasize the collective ownership of the means of production and the establishment of a classless society. Originating in the 19th century, it gained significant influence in the 20th century, particularly after the Russian Revolution, leading to the establishment of communist states. The party played a crucial role in shifting global power dynamics, influencing resistance movements and ultimately shaping the end of the Cold War.
Eastern Europe: Eastern Europe refers to a region that encompasses various countries situated to the east of Germany and Austria, characterized by a complex history of political, cultural, and social dynamics, particularly during the Cold War and its aftermath. This region has been significantly shaped by its experiences under communist rule, the impact of decolonization, and the shifting balance of power in the 20th century.
Fall of the Berlin Wall: The Fall of the Berlin Wall refers to the event on November 9, 1989, when the barrier dividing East and West Berlin was opened, symbolizing the end of the Cold War and the collapse of communist control in Eastern Europe. This historic moment represented a significant shift towards democracy and reunification in Germany, marking a turning point in global politics as it led to the dissolution of the Soviet Union's influence over Eastern Europe.
Freedom of the Press and Assembly: Freedom of the Press and Assembly refers to the rights that protect individuals' abilities to express themselves through various forms of media and to gather peacefully for protests, demonstrations, or meetings. These rights are essential for promoting democratic governance, allowing citizens to voice their opinions, hold authorities accountable, and advocate for social change, especially during pivotal moments like the end of the Cold War when political transformations and public dissent were prevalent.
Glasnost: Glasnost, meaning 'openness' in Russian, was a policy introduced by Mikhail Gorbachev in the 1980s aimed at increasing transparency and freedom of expression within the Soviet Union. This policy encouraged public debate and allowed citizens to express their opinions about the government, leading to greater access to information and a reduction in censorship. Glasnost was crucial in reshaping Soviet society and contributed significantly to the events that led to the end of the Cold War.
Mikhail Gorbachev: Mikhail Gorbachev was the last leader of the Soviet Union, serving from 1985 until its dissolution in 1991. He is best known for his policies of glasnost (openness) and perestroika (restructuring), which aimed to reform the stagnant Soviet economy and encourage greater political freedom. Gorbachev's leadership played a crucial role in ending the Cold War, as his reforms and diplomatic efforts led to improved relations with the West and ultimately contributed to the collapse of communist regimes in Eastern Europe.
Mujahideen: The Mujahideen refers to various groups of Islamic guerrilla fighters who fought against foreign invaders and local governments perceived as un-Islamic, particularly in Afghanistan during the Soviet-Afghan War (1979-1989). These fighters emerged as significant players in the geopolitical landscape of the Cold War, receiving support from Western countries like the United States as part of a broader strategy to counter Soviet influence in the region.
Nuclear Weapons: Nuclear weapons are explosive devices that derive their destructive power from nuclear reactions, either fission or fusion. These weapons have played a critical role in shaping international relations and military strategies, especially during significant global conflicts and the subsequent geopolitical landscape, profoundly influencing the tensions and resolutions seen at the close of major conflicts and in the establishment of newly independent nations.
Perestroika: Perestroika, meaning 'restructuring' in Russian, was a political movement initiated by Mikhail Gorbachev in the mid-1980s aimed at reforming the stagnant economy and political system of the Soviet Union. This policy sought to introduce elements of capitalism and decentralization within a socialist framework, ultimately leading to significant changes in governance and society, and played a crucial role in ending the Cold War.
Soviet Bloc: The Soviet Bloc refers to a group of socialist states in Central and Eastern Europe that were under the influence or direct control of the Soviet Union during the Cold War. These countries, including Poland, East Germany, Czechoslovakia, Hungary, Romania, and Bulgaria, were characterized by one-party rule and centralized economic planning. The Soviet Bloc played a crucial role in the geopolitical tensions of the Cold War and ultimately contributed to its end as these nations moved towards reform and democratization.
Strategic Arms Reduction Treaty (START): The Strategic Arms Reduction Treaty (START) was a bilateral agreement between the United States and the Soviet Union aimed at reducing and limiting the strategic nuclear weapons of both nations. This treaty represented a significant step towards de-escalating tensions during the later years of the Cold War, highlighting a mutual recognition of the dangers posed by nuclear proliferation. START played a crucial role in shaping arms control policies, fostering dialogue between the two superpowers, and ultimately contributing to the end of the Cold War.
U.S. Technological/Military Advances: U.S. Technological/Military Advances refer to the significant improvements and innovations in military technology and capabilities developed by the United States, particularly during the Cold War era and its conclusion. These advances played a crucial role in shaping military strategies, enhancing defense mechanisms, and influencing global power dynamics as the Cold War came to an end. Innovations such as stealth technology, precision-guided munitions, and advanced communications systems were pivotal in redefining warfare and asserting U.S. military dominance on the world stage.