Review AP World Unit 9 to understand how technology, trade, culture, and rights movements transformed the world from 1900 to today. This unit covers globalization's causes, effects, and the many ways people embraced or resisted increasing interconnectedness.
Use the topic guides, key terms, and practice questions available on Fiveable to build your full Unit 9 review.
What is AP World Unit 9? Unit 9 covers globalization from 1900 to the present, asking you to explain how and why the world became more interconnected and what the consequences of that integration have been.
Radio, the internet, air travel, and shipping containers reduced geographic distance. The Green Revolution fed a growing population, vaccines and antibiotics extended lifespans, and birth control transformed reproductive practices. These advances raised productivity but also created new inequalities in access.
After the Cold War, governments from Reagan's United States to Deng Xiaoping's China promoted free-market liberalization. Multinational corporations, NAFTA, the EU, and the WTO tied economies together. The UN, IMF, and World Bank became central to international cooperation and sparked debate about who benefits from global integration.
Popular culture went global through Bollywood, K-pop, Hollywood, and social media brands like Facebook. Rights-based movements challenged assumptions about race, gender, and class using documents like the UN Universal Declaration of Human Rights. At the same time, anti-IMF protests and locally developed platforms like Weibo showed that globalization also generated resistance.
Globalization created genuine gains in health, wealth, and cultural connection, but those gains were unevenly distributed. The same technologies and trade networks that lifted some regions also deepened inequality, accelerated environmental degradation, and threatened local identities. Your job on the AP exam is to explain both sides of that tension with specific evidence.
New communication technologies, transportation systems, energy sources, agricultural innovations, and medical breakthroughs reduced geographic distance and transformed human populations after 1900.
Poverty-linked diseases like malaria and cholera persisted, emergent epidemics like HIV/AIDS and the 1918 influenza pandemic caused social disruption, and longer lifespans produced new chronic diseases like Alzheimer's.
Human activity caused deforestation, desertification, declining air and water quality, and greenhouse gas emissions, generating intense international debates about climate change and resource competition.
Free-market liberalization accelerated after the Cold War, manufacturing shifted to Asia and Latin America, knowledge economies grew in wealthier regions, and multinational corporations and trade agreements tied the global economy together.
Rights-based movements challenged assumptions about race, class, gender, and religion, expanding access to voting and education while also protesting the unequal environmental and economic effects of global integration.
Music, film, sports, social media, and consumer brands crossed national borders, creating a shared global popular culture exemplified by K-pop, Bollywood, the FIFA World Cup, and brands like Coca-Cola and McDonald's.
Responses to globalization included anti-IMF and anti-World Bank activism, cultural preservation efforts, and the creation of locally controlled alternatives like Weibo in China.
New international organizations including the United Nations, IMF, World Bank, WTO, EU, and ASEAN formed to maintain peace, stabilize the global economy, and facilitate cooperation among states.
Science and technology transformed communication, transportation, agriculture, and medicine after 1900, but older patterns of inequality, social hierarchy, and religious practice showed significant continuity alongside that change.
Open this guide for a closer review of the topic.
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Across 29k multiple-choice practice attempts for this unit.
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Across 136 scored free-response attempts for this unit.
Across 52 scored short-answer attempts for this unit.
Review Economics in the Global Age with attention to how the concept appears in AP-style source and evidence questions.
Review Resistance to Globalization after 1900 with attention to how the concept appears in AP-style source and evidence questions.
Review Institutions Developing in a Globalized World with attention to how the concept appears in AP-style source and evidence questions.
Review Technological Advances and Limitations after 1900: Disease with attention to how the concept appears in AP-style source and evidence questions.
After 1900, breakthroughs in communication, transportation, energy, agriculture, and medicine fundamentally changed how people lived and how connected the world became. The key skill here is explaining how specific technologies produced specific changes, not just listing inventions.
| Technology | Primary effect | Secondary consequence |
|---|---|---|
| Internet and cellular communication | Reduced geographic distance for information | Enabled global commerce and social movements |
| Shipping containers and air travel | Lowered cost of moving goods and people | Accelerated manufacturing shift to Asia and Latin America |
| Green Revolution agriculture | Increased food production and sustained population growth | Spread chemical-intensive farming and environmental pressure |
| Vaccines and antibiotics | Reduced infectious disease mortality | Contributed to population growth and aging populations |
| Birth control | Gave women reproductive autonomy | Contributed to declining fertility rates in many regions |
Disease patterns after 1900 reflect three overlapping trends: poverty-linked diseases persisted, new epidemic diseases emerged and caused social disruption, and longer lifespans produced new chronic diseases. Medical advances responded to but did not eliminate these challenges.
Industrialization, population growth, and commercial agriculture put unprecedented pressure on the environment after 1900. The AP exam focuses on causation: human activity caused specific environmental changes, and those changes produced political and social debates.
The late 20th century saw a major shift toward free-market economic policies worldwide, accelerated by the end of the Cold War. Manufacturing moved to Asia and Latin America while knowledge economies grew in wealthier regions, and new institutions and trade agreements tied the global economy together.
| Economy type | Key regions | AP example |
|---|---|---|
| Knowledge economy | United States, Finland, Japan | Growth of information technology and services sectors |
| Manufacturing economy | China, South Korea, Mexico, Brazil | Export-oriented industrial production, Asian Tiger growth |
| Free-market liberalization | United States, United Kingdom, Chile, China | Reagan, Thatcher, Pinochet, Deng Xiaoping policies |
Rights-based movements after 1900 challenged old assumptions about race, class, gender, and religion. These movements expanded access to education, voting, and professional roles, and they also protested the unequal effects of global integration on marginalized communities.
After 1900, especially in the second half of the century, popular culture and consumer brands crossed national borders at an unprecedented scale. At the same time, many communities pushed back against cultural and economic globalization to protect local identity and sovereignty.
| Form of globalization | Example | Form of resistance |
|---|---|---|
| Global popular culture | Hollywood, K-pop, FIFA World Cup | Preservation of local languages and folk traditions |
| Global consumer brands | McDonald's, Coca-Cola, Amazon | Fair trade movements, local market preferences |
| Western-dominated social media | Facebook, Twitter, Instagram | Weibo in China, state-controlled internet platforms |
| IMF and World Bank economic policies | Structural adjustment programs | Anti-IMF protests, dependency theory critiques |
After World War II, states built new international organizations to manage the challenges of a more connected world. The AP exam focuses on how and why globalization changed interactions among states, so the key idea is cooperation through institutions, not the internal details of every organization.
Topic 9.9 asks you to evaluate the extent to which science and technology changed the world from 1900 to the present. This is a continuity and change over time task: you need to weigh what genuinely transformed against what persisted, including older patterns of inequality, social hierarchy, and religious practice.
Try AP-style multiple-choice questions and written prompts after you review the notes.
| Term | Definition |
|---|---|
| Green Revolution | A series of agricultural innovations including high-yield crop varieties, synthetic fertilizers, and pesticides that increased food production and sustained population growth after the mid-20th century, especially in Asia and Latin America. |
| Economic Liberalization | The reduction of government restrictions on markets, including deregulation, lowered tariffs, and privatization, promoted by governments like Reagan's United States, Thatcher's Britain, and Deng Xiaoping's China in the late 20th century. |
| Multinational Corporation | A company that operates production or services across multiple countries, such as Toyota, McDonald's, and Coca-Cola, playing a central role in spreading free-market economic practices globally. |
| Knowledge Economy | An economy driven by information technology, services, and intellectual production rather than manufacturing, exemplified by the United States, Finland, and Japan in the late 20th century. |
| Green Belt Movement | An environmental organization founded in Kenya in 1977 by Wangari Maathai that addressed deforestation through tree planting and linked environmental conservation to social justice and women's empowerment. |
| U.N. Universal Declaration of Human Rights | A 1948 international document asserting universal human rights, used by rights-based movements to advocate for the rights of women, children, and refugees across the globe. |
| Greenhouse Gases | Atmospheric gases, primarily from fossil fuel combustion, that trap heat and contribute to global warming, generating international debates about climate change causes and responsibility after 1900. |
| HIV/AIDS | An emergent epidemic disease that spread globally after the late 20th century, causing significant social disruption and spurring major advances in medical research and international public health cooperation. |
| 1918 influenza pandemic | A major global epidemic that killed tens of millions of people worldwide, illustrating how emergent diseases could cause mass death and social disruption even as medical technology advanced. |
| Negritude movement | An intellectual and cultural movement that challenged racist assumptions about Black identity and asserted pride in African and African diaspora heritage, exemplifying rights-based challenges to racial assumptions after 1900. |
| Liberation theology | A theological movement in Latin America that interpreted Christian teachings as a call for social justice and the liberation of the poor, challenging assumptions about class and religion. |
| NAFTA | The North American Free Trade Agreement, enacted in 1994 among the United States, Canada, and Mexico, which eliminated many trade barriers and exemplified the spread of free-market economic integration in the late 20th century. |
| Consumer Culture | A societal framework in which buying and consuming goods is central to economic and cultural life, which became globalized after 1900 through brands like Coca-Cola, McDonald's, and online platforms like Amazon and Alibaba. |
| Desertification | The process by which fertile land becomes increasingly arid and unproductive, driven by deforestation, unsustainable agriculture, and climate change, intensifying resource competition after 1900. |
| International Monetary Fund (IMF) | An international organization established in 1944 to promote global monetary cooperation and financial stability, which became a target of anti-globalization activism for its structural adjustment policies in the Global South. |
Students often list technological advances without addressing the unequal distribution of benefits, environmental costs, or the resistance globalization generated. The AP exam rewards arguments that acknowledge both gains and consequences.
Malaria and cholera are poverty-linked, not emergent epidemics. HIV/AIDS and the 1918 influenza pandemic are emergent epidemics. Heart disease and Alzheimer's are diseases of longevity. Mixing these up weakens evidence in free-response answers.
Naming Reagan, Thatcher, Deng Xiaoping, and Pinochet is not enough. You need to explain what free-market liberalization actually meant, such as deregulation, reduced tariffs, and privatization, and what changed as a result.
Saying K-pop and Bollywood are global is a description, not an explanation. The AP exam asks why culture became more global, which requires connecting specific technologies like the internet and satellite television to the spread of cultural products.
Topic 9.9 is a continuity and change over time task. Simply restating what changed in Unit 9 is not enough. You need to evaluate the extent of change by weighing transformations against persistent patterns and making a defensible claim.
Unit 9 content appears frequently in causation tasks asking you to explain how specific technologies or human activities produced specific changes in populations, economies, or the environment. Practice writing causation statements that name a mechanism, not just a correlation, such as explaining how shipping containers lowered trade costs and accelerated manufacturing shifts to Asia.
Topic 9.9 is explicitly a continuity and change over time task, and that reasoning skill runs through the entire unit. Free-response questions may ask you to evaluate the extent to which globalization transformed economies, cultures, or social structures from 1900 to the present. Strong responses name specific changes, acknowledge what persisted, and make a claim about relative significance.
Unit 9 connects to earlier units, and comparison tasks may ask you to link globalization patterns to earlier trade networks from Unit 2, industrialization from Unit 6, or decolonization from Unit 8. You may also be asked to compare how different regions, such as knowledge economies versus manufacturing economies, or the Global North versus the Global South, experienced globalization differently.
Open the individual guides for Unit 9 when you want a closer review of one topic.
browse guidesPractice free-response reasoning and compare your answer with scoring guidance.
practice FRQsWatch past review streams filtered to Unit 9 when you want a video walkthrough.
open videosUse unit cheatsheets for a quick visual review after you work through the notes.
open cheatsheetsEstimate your broader AP score goal after you review the course and exam format.
open calculatorAP World Unit 9 covers 9 topics on globalization from 1900 to the present: Advances in Technology and Exchange, Disease in the 20th Century, Debates about the Environment, Economics in the Global Age, Calls for Reform and Responses, Globalized Culture, Resistance to Globalization, Institutions Developing in a Globalized World, and Continuity and Change in a Globalized World. See the full breakdown at /ap-world/unit-9.
AP World Unit 9 makes up 8-10% of the AP exam. That slice covers globalization from 1900 to the present, including topics like economics in the global age, advances in technology and exchange, debates about the environment, and resistance to globalization. It's a smaller unit by weight, but the themes connect directly to the long-essay and document-based questions.
The AP World Unit 9 progress check includes MCQ and FRQ parts that test globalization content from 1900 to the present. The MCQ section draws on topics like advances in technology and exchange, economics in the global age, globalized culture, and resistance to globalization. The FRQ part typically asks you to analyze continuity and change or causation across those same themes. For matched practice questions that mirror the progress check format, visit /ap-world/unit-9.
AP World Unit 9 FRQs most often focus on globalization themes like resistance to globalization, calls for reform and responses, and continuity and change in a globalized world. The question types you'll see are SAQ (short-answer), LEQ (long-essay), and DBQ (document-based question), all asking you to argue causation or continuity and change. To practice, write timed responses using specific evidence from topics 9.1-9.9, then check your thesis and evidence against the College Board rubric. Find practice prompts and study guides at /ap-world/unit-9.
The best place to find AP World Unit 9 practice questions, including MCQ sets and practice test questions on globalization, is /ap-world/unit-9. There you'll find multiple-choice questions covering all 9 topics, from advances in technology and exchange to debates about the environment and economics in the global age. Working through unit-specific MCQs is the fastest way to spot the topics you need to review before the exam.
Start studying AP World Unit 9 by building a timeline of globalization from 1900 to the present, anchoring key events to each topic. Focus first on advances in technology and exchange (9.1) and economics in the global age (9.4) since those underpin almost every other topic. Then work through calls for reform and responses (9.5), resistance to globalization (9.7), and debates about the environment (9.3), because those show up most often in FRQ prompts asking for causation or continuity and change. After reading, do a short MCQ set to check retention, then write one timed SAQ or LEQ using specific evidence. Repeat that read-quiz-write cycle for each topic. Find guides and practice sets at /ap-world/unit-9.