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Spread of Communism After 1900 - AP Modern World History Study Guide

Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026

Learn with study guides reviewed by top AP teachers. This guide takes about 16 minutes to read.

Getting Started

After 1900, the world witnessed profound political and economic upheaval, creating fertile ground for revolutionary ideologies. This chapter focuses on the spread of communism, an ideology advocating for a classless society where all property is publicly owned and each person works and is paid according to their abilities and needs. We will examine how and why communism took hold in China and explore the broader global trend of movements aimed at redistributing economic resources in Asia, Africa, and Latin America.

What You Should Be Able to Do

After studying this topic, you should be able to:

  • Explain the causes of the communist revolution in China.

  • Explain the consequences of communist economic policies in China.

  • Explain the causes of movements to redistribute economic resources in various states.

  • Explain the effects of these resource redistribution movements.

Key Developments & Analysis

This section uses Causation as its primary lens to explore the rise of communism in China and related global movements. We will analyze the specific causes that led to these major historical shifts and the immediate and long-term effects that followed.

The Chinese Communist Revolution

Causes:

  • Internal Tension: For decades, China faced significant internal instability. The ruling Nationalist government struggled to consolidate control, and a long and brutal civil war against the communists, coupled with widespread poverty and peasant discontent, created a power vacuum and a population desperate for change.

  • Japanese Aggression: Japan’s invasion of China in the 1930s and the subsequent devastation of World War II severely weakened the Nationalist government. Chinese communists, led by Mao Zedong, gained immense popular support and military experience by positioning themselves as the primary defenders of the nation against foreign invaders.

Effects & Impacts:

  • Immediate Effects: The Chinese Communist Party (CCP) successfully seized power in 1949, establishing the People's Republic of China. The defeated Nationalists fled to the island of Taiwan. This victory marked the culmination of the Chinese communist revolution.

  • Long-Term Impacts: China was transformed into a major communist state, fundamentally altering the global balance of power during the Cold War. The new government began a radical, state-directed restructuring of Chinese society, politics, and its national economy.

Economic Policies in Communist China

Causes:

  • Communist Ideology: The CCP was committed to Marxist-Leninist principles, which required the elimination of private property and the establishment of a centrally planned economy controlled by the government.

  • Goal of Rapid Industrialization: Mao Zedong launched the Great Leap Forward, a government-led economic campaign from 1958 to 1962. Its primary goal was to rapidly transform China from an agrarian economy into a modern industrial and communist society, bypassing traditional stages of development.

Effects & Impacts:

  • Immediate Effects: The government implemented repressive policies, forcing peasants onto massive agricultural collectives and ordering the creation of backyard furnaces to produce steel. This top-down control completely disrupted traditional farming and economic life.

  • Long-Term Impacts: The Great Leap Forward was a catastrophic failure. The diversion of labor from farming and inefficient techniques led to a massive famine, resulting in tens of millions of deaths. These negative repercussions for the population demonstrated the devastating human cost of radical, state-controlled economic experiments.

Global Movements for Resource Redistribution

Causes:

  • Post-Colonial Grievances: Many states in Africa, Asia, and Latin America that gained independence after 1900 inherited economies with extreme inequality, particularly in land ownership, which was often a legacy of colonial exploitation.

  • Desire for Economic Sovereignty: National leaders and popular movements sought to gain control over their countries' resources—such as land, mines, and industries—to promote economic development and reduce poverty for the majority of their populations.

  • Ideological Influence:Socialism, a political and economic theory advocating for community or state ownership and administration of the means of production and distribution of goods, offered a popular model. Communism also served as an inspiration for more radical state-led redistribution efforts.

Effects & Impacts:

  • Immediate Effects: Governments across the developing world initiated movements to redistribute land and resources. This often took the form of land reform, where large estates were broken up and given to peasants, or the nationalization of key industries.

  • Long-Term Impacts: The outcomes of these movements varied widely. In some cases, they led to modest improvements in living standards for the rural poor. In others, they resulted in decreased agricultural productivity, internal political conflict, and authoritarian governments that used redistribution as a tool for consolidating power.

Data & Organization Tools

Matrix of Resource Redistribution Movements

RegionPrimary GoalIdeological InfluenceCommon Policies & Outcomes
China (Asia)Create a fully communist, industrial society.CommunismThe Great Leap Forward led to total state control, collectivization, and ultimately, catastrophic famine and negative repercussions.
States in AfricaAchieve economic independence and reduce post-colonial inequality.Socialism, Pan-AfricanismLand reform and nationalization of foreign-owned assets. Results were mixed, often leading to political instability or one-party rule.
States in Latin AmericaAddress historic inequality in land ownership benefiting a small elite.Socialism, CommunismLand redistribution programs aimed at empowering landless peasants. Often met with strong internal and external opposition, leading to political conflict.

Evidence Bank

  • Chinese Communist Party (CCP): The founding and ruling political party of the People's Republic of China. Led by Mao Zedong, it won the Chinese Civil War and implemented communist policies.

  • Mao Zedong: The principal leader of the Chinese communist revolution and the chairman of the CCP from 1949 until his death in 1976. He was the architect of the Great Leap Forward.

  • Great Leap Forward: An economic and social campaign by the CCP from 1958 to 1962. It aimed to use China's vast population to rapidly transform the country into a modern communist society, but it resulted in a devastating famine.

  • Land Reform: A policy of redistributing agricultural land, often by breaking up large estates and giving smaller parcels to formerly landless peasants. It was a central policy in China and many other states in Asia, Africa, and Latin America.

  • Collectivization: The forced consolidation of individual peasant households into large, state-controlled collective farms. This was a key feature of the Great Leap Forward in China.

  • Nationalization: The process of a government taking control of privately owned industries, resources, or assets. This was a common tactic used by states in Africa, Asia, and Latin America to gain control of their economies.

  • Communism: An ideology that seeks to establish a classless, stateless society where the means of production are owned and controlled by the community. In practice, it led to authoritarian states with command economies.

  • Socialism: A range of economic and social systems characterized by social ownership of the means of production. It often advocates for gradual change and can coexist with democratic political systems, unlike the revolutionary and authoritarian nature of 20th-century communism.

Skill Snapshots

  • Causation:

    • Internal tension and Japanese aggression → The CCP seized power in China.

    • The CCP's desire for rapid industrialization → The implementation of the Great Leap Forward.

    • State control over agriculture during the Great Leap Forward → Widespread famine and negative repercussions for the population.

  • Comparison:

    • China's communist revolution was driven by a prolonged civil war, whereas many resource redistribution movements in Africa were driven by post-colonial state-building efforts.

    • While China implemented total collectivization of agriculture, some socialist states in Latin America pursued more limited land reform, breaking up large estates but not always eliminating private farming.

    • The negative repercussions of the Great Leap Forward in China were far more severe in terms of human life than the economic disruptions caused by most nationalization policies in Africa.

  • Continuity & Change Over Time (CCOT):

    • Baseline (c. 1900): Most societies in Asia, Africa, and Latin America were agrarian with highly unequal land distribution, often dominated by a small elite or foreign interests.

    • Change: The rise of communism and socialism inspired state-led movements to seize and redistribute land and resources from the elite to the masses.

    • Change: China was completely transformed from a fractured republic into a powerful, unified communist state with a centrally planned economy.

    • Continuity: Despite revolutionary changes, the struggle for economic development and the challenge of alleviating rural poverty remained a persistent issue in many of these states.

Common Misconceptions & Clarifications

  1. "Communism and socialism are the same." While related, they are distinct. Twentieth-century communism, as practiced in China, involved a revolutionary, one-party state with total government control over the economy. Socialism describes a broader range of ideas, many of which advocate for reform within democratic systems.

  2. "The Chinese Communist Revolution was a quick takeover." It was the result of over two decades of brutal civil war, political struggle, and resistance against foreign invasion.

  3. "The Great Leap Forward was a military campaign." It was a purely economic and social campaign focused on internal development (industrialization and agricultural production), not external conquest.

  4. "Only communist countries practiced land redistribution." Many non-communist and democratic states across the world also implemented land reform programs during the 20th century to address social inequality and promote economic stability.

One-Paragraph Summary

The period after 1900 saw the dramatic spread of communism, most significantly in China, where internal tensions and Japanese aggression enabled the Chinese Communist Party to seize power. Once in control, the government's attempt to rapidly industrialize through the Great Leap Forward resulted in repressive policies and catastrophic famine, highlighting the severe negative repercussions of such state-led economic experiments. Beyond China, the desire to correct colonial-era inequalities and achieve economic independence fueled similar, though often less radical, movements to redistribute land and resources across newly independent states in Africa, Asia, and Latin America. These movements, frequently inspired by communist or socialist ideals, fundamentally reshaped economic and political landscapes across the globe, with widely varying degrees of success and failure.