AP World History: Modern Unit 6 ReviewIndustrialization's Impact (1750-1900)

AP World Unit 6, Industrialization's Impact (1750-1900), is about what happened when industrialized states turned their new machine-made power outward. The single biggest idea is that industrialization drove a new wave of imperialism, as Europe, the United States, and Japan carved up Africa, Asia, and the Pacific for raw materials and markets, sparked resistance from colonized peoples, and set off the largest migrations in history up to that point. The unit covers 1750 to 1900 and counts for 12-15% of the AP exam, making it one of the most heavily weighted units in the course.

What this unit covers

Why empires expanded and how they justified it

• Imperial powers leaned on a set of ideologies to justify taking over other societies. Social Darwinism applied "survival of the fittest" to nations and races. The civilizing mission (and Kipling's "White Man's Burden") claimed Europeans had a duty to "uplift" colonized peoples. Nationalism made colonies a point of pride, and missionaries pushed religious conversion.
• These rationales mattered because they let imperial powers frame conquest as moral. On the exam, primary sources from this unit often drip with this language, and you analyze the point of view behind it.
• State power shifted in specific, comparable ways. Britain took direct control of India from the British East India Company after 1857. Spain and Portugal's influence declined while Britain, France, the U.S., and Japan expanded. European powers used both warfare and diplomacy to divide Africa, formalized at the Berlin Conference (1884-85), where no African representatives were present.
• Some empires were settler colonies (Australia, New Zealand, parts of Africa) where Europeans moved in permanently, displacing indigenous peoples. The U.S. expanded westward at indigenous nations' expense, and Russia and Japan expanded over land and sea in Asia.

How colonized peoples fought back

• Resistance was not one thing. It took three main forms, and being able to sort examples into them is a classic exam move.
• Direct armed resistance includes Túpac Amaru II's rebellion in Peru (1780), Samory Touré's wars against the French in West Africa, and the Yaa Asantewaa War in Asante (Ghana).
• Creating new states on the edges of empire includes the Zulu Kingdom in southern Africa, the Sokoto Caliphate in West Africa, and the Cherokee Nation's attempt at recognized statehood.
• Religiously inspired rebellion includes the Sepoy Rebellion in India (1857), the Mahdist movement in Sudan, the Ghost Dance in North America, and the Xhosa Cattle Killing in southern Africa. These movements drew on spiritual ideas to imagine a world without colonizers.
• Growing nationalism fed early anticolonial organizing, like the founding of the Indian National Congress in 1885. That thread pays off big in Unit 8.

The new global economy of extraction

• Factories needed raw materials and growing cities needed food, so colonized and semi-colonized regions were reorganized into export economies built around one or two commodities. Think cotton in Egypt and India, rubber in the Amazon and the Congo basin, palm oil in West Africa, and guano in Peru and Chile.
• The profits flowed back to industrialized states, which sold finished goods to the same regions. That loop is the core mechanism of the unit. Colonies exported cheap raw materials and imported expensive manufactured goods, locking in economic dependence.
• Economic imperialism means controlling a region's economy without formally ruling it, mostly in Asia and Latin America. The textbook case is Britain and France forcing China open through the Opium Wars (1839-42, 1856-60), unequal treaties, and spheres of influence. British-financed projects like the Port of Buenos Aires gave foreign investors leverage over Latin American economies.

People on the move

• Industrialization scrambled where people lived. New transportation (steamships, railroads) made long-distance moves possible and cheap, and the 19th century saw massive global urbanization as internal and external migrants poured into cities.
• Some migration was free and work-driven, like the Irish to the United States and Italian industrial workers to Argentina. Some migrants returned home periodically or permanently, like Japanese agricultural workers in the Pacific and Lebanese merchants in the Americas.
• The capitalist economy still relied on coerced and semi-coerced labor. After slavery's abolition, Chinese and Indian indentured servants worked plantations and built railroads across the Caribbean, Pacific, and Indian Ocean. Convict labor populated penal colonies like Australia.
• Migration reshaped both ends of the journey. Migrants were mostly male, so women back home took on roles men had held. Migrants built ethnic enclaves (Chinese communities in Southeast Asia and the Americas, Indian communities in East Africa and the Caribbean) that transplanted their cultures. Receiving societies often responded with prejudice and legal restriction, like the Chinese Exclusion Act (1882) in the U.S. and the White Australia Policy.

Unit 6, Industrialization's Impact (1750-1900) at a glance

Why Unit 6, Industrialization's Impact (1750-1900) matters in AP World

Unit 6 is where the course's big themes of governance, economics, and humans-and-the-environment collide. It explains how a handful of industrialized states came to control most of the planet by 1900, and it sets up nearly everything in the 20th-century units.

• It shows the second half of the industrialization story. Unit 5 covers how industrialization happened; Unit 6 covers what industrial power did to everyone else.
• It is the course's deepest dive into the theme of state-building through empire, and into resistance as a form of state-building.
• It establishes the economic dependency patterns (raw materials out, finished goods in) that explain global inequality debates in Unit 9.
• The capstone skill here is causation. You practice weighing which effects of imperialism mattered most, which is exactly what LEQ prompts ask.

How this unit connects across the course

• Backward to Revolutions (Unit 5): the Industrial Revolution, nationalism, and Enlightenment ideas from Unit 5 are the engine and the fuel of Unit 6. Imperial powers used industrial weapons and nationalist pride to expand, while colonized peoples turned Enlightenment ideas about sovereignty against their rulers.
• Backward to Transoceanic Interactions (Unit 4): the maritime empires and coerced labor systems of 1450-1750 are the prequel. Unit 6 imperialism is faster, deeper, and ideology-driven, and comparing the two waves of European expansion is a classic essay setup.
• Forward to Global Conflict (Unit 7): imperial rivalries, especially the scramble for Africa and competition over China, feed directly into the alliance tensions behind World War I.
• Forward to Cold War and Decolonization (Unit 8): the anticolonial nationalism that starts here (Indian National Congress, anti-imperial rebellions) becomes the independence movements that dismantle these same empires after 1945.

Timeline

• 1780: Túpac Amaru II leads a massive indigenous rebellion against Spanish rule in Peru, an early model of direct anti-imperial resistance.
• 1839-1842: The First Opium War forces China open to British trade, beginning a century of unequal treaties and spheres of influence.
• 1853: Commodore Perry arrives in Japan, pressure that pushes Japan toward Meiji-era industrialization and, eventually, its own empire.
• 1856-1857: The Xhosa Cattle Killing in southern Africa, a religiously inspired response to colonial pressure that devastates Xhosa society.
• 1857: The Sepoy Rebellion sweeps northern India; afterward Britain dissolves the East India Company's rule and governs India directly as the British Raj.
• 1869: The Suez Canal opens, shortening the route between Europe and Asia and raising the strategic stakes of controlling Egypt.
• 1881-1898: The Mahdist movement in Sudan builds a state in defiance of British and Egyptian control, a major religious rebellion.
• 1882: The Chinese Exclusion Act bars Chinese laborers from the U.S., the clearest example of states restricting migration.
• 1884-1885: The Berlin Conference sets rules for dividing Africa among European powers, with no Africans at the table; the Scramble for Africa accelerates.
• 1885: The Indian National Congress forms, channeling Indian nationalism into organized anticolonial politics.
• 1890: The Ghost Dance movement spreads among Plains nations, ending in the massacre at Wounded Knee.
• 1900: The Yaa Asantewaa War, the Asante's final armed resistance to British control in West Africa.

Key people and groups

• King Leopold II of Belgium: personally ruled the Congo Free State, where brutal forced rubber extraction killed millions and became the era's most notorious atrocity.
• Túpac Amaru II: led the largest indigenous uprising against Spanish colonial rule in Peru, executed in 1781 but remembered as a resistance symbol.
• Samory Touré: built the Wassoulou Empire in West Africa and fought the French military for nearly two decades.
• Yaa Asantewaa: Asante queen mother who led the final war against British colonization of the Asante Empire.
• Muhammad Ahmad (the Mahdi): declared himself the Islamic redeemer and led the Mahdist revolt that expelled British-Egyptian forces from Sudan.
• Cecil Rhodes: British imperialist and mining magnate in southern Africa whose ambitions embodied the Scramble for Africa.
• Sepoys: Indian soldiers in the East India Company's army whose 1857 rebellion transformed British rule in India.
• Commodore Matthew Perry: U.S. naval officer whose 1853 expedition forced Japan to open to Western trade.
• British East India Company: the joint-stock company that ruled much of India until Britain assumed direct control after 1857.
• Indian National Congress: founded 1885, the political organization that became the core of Indian nationalism.

Unit 6, Industrialization's Impact (1750-1900) on the AP exam

Unit 6 carries 12-15% of the exam, tied for the heaviest weight in the course, so expect it everywhere.

• Multiple-choice questions are stimulus-based. You'll get an imperialist speech, an anticolonial pamphlet, a trade statistics table, or a map of colonial Africa, then answer questions about its purpose, context, and what it shows about the period.
• Short-answer questions often hand you a historian's argument or a primary source about imperialism or migration and ask you to identify and explain evidence that supports or challenges it.
• This unit is prime DBQ territory. Documents written by colonizers and the colonized force you to analyze point of view and purpose, exactly what the sourcing point rewards.
• LEQ prompts from this era lean on causation (causes or effects of imperialism, causes of migration), comparison (responses to imperialism across regions, or 1450-1750 versus 1750-1900 expansion), and continuity and change (global trade patterns, labor systems).
• The single most useful prep move is organizing examples by category. Know two or three named examples each for rationales, forms of resistance, export economies, and migration patterns, and you can answer almost any prompt this unit throws at you.

Essential questions

• Why did industrialized states expand their empires between 1750 and 1900, and how did they justify it?
• How did colonized peoples resist imperialism, and why did resistance take such different forms in different places?
• How did imperialism reorganize the global economy around extraction, and who benefited?
• How did industrialization and empire reshape where people lived and how societies treated newcomers?

Key terms to know

• Social Darwinism: the misapplication of "survival of the fittest" to nations and races, used to claim imperial conquest was natural.
• Civilizing mission: the claim that Europeans had a duty to bring "civilization" to colonized peoples, used to justify imperial rule.
• Settler colony: a colony where large numbers of imperial citizens moved permanently, displacing indigenous populations, as in Australia and New Zealand.
• Scramble for Africa: the rapid European partition of nearly the entire African continent in the late 19th century.
• Economic imperialism: controlling another region's economy through trade, debt, and investment rather than direct political rule.
• Spheres of influence: zones, especially in China, where one foreign power held exclusive trading and investment privileges.
• Unequal treaties: agreements forced on China and Japan that granted Western powers trade access and legal privileges on lopsided terms.
• Export economy: a colonial economy reorganized to produce one or two raw materials (cotton, rubber, palm oil) for industrial buyers abroad.
• Cash crop: a crop grown for sale on the world market rather than local consumption, the backbone of export economies.
• Indentured servitude: labor contracted for a fixed term in exchange for passage, the system that moved millions of Chinese and Indian workers after slavery's abolition.
• Penal colony: a settlement populated by convict labor, such as British Australia.
• Ethnic enclave: a neighborhood or community where migrants preserved their home culture, like Chinatowns in the Americas or Indian communities in East Africa.
• Ghost Dance: a religious movement among Plains nations promising the removal of settlers, suppressed violently at Wounded Knee.
• Raj: direct British government rule over India after 1857, replacing East India Company control.

Common mix-ups

• Unit 5 versus Unit 6: Unit 5 is how industrialization and political revolutions happened; Unit 6 is the consequences, meaning imperialism, economic extraction, and migration. If a prompt is about factories and the spinning jenny, that's Unit 5. If it's about colonies, raw materials, or migrants, that's Unit 6.
• Imperialism versus economic imperialism: Britain ruled India directly (imperialism), but Britain never formally ruled China or Argentina. It controlled their economies through opium, treaties, and investment (economic imperialism). China stayed nominally sovereign.
• Indentured servitude is not slavery. Indentured laborers signed contracts for a fixed term, even if conditions were often brutal and the choice semi-coerced. The exam expects you to treat it as a distinct labor system that grew after abolition.
• The Sepoy Rebellion did not end British rule in India. It ended Company rule. Britain responded by tightening control under the direct government of the Raj, which lasted until 1947.