AMSCO 6.4 Global Economic Development Notes

Overview

Topic 6.4, Global Economic Development (AMSCO p. 398-406), explains how environmental factors and industrial demand reshaped the world economy between 1750 and 1900. As Europe and the United States industrialized, they turned colonies in Asia, Africa, and Latin America into export economies that supplied raw materials like cotton, rubber, palm oil, and guano, then bought back finished goods. This chapter sits at the heart of Unit 6 (Consequences of Industrialization) and connects the rationales for imperialism in 6.1 to the economic imperialism covered in 6.5.

The chapter opens with a great hook: in 1850, President Millard Fillmore told Congress the U.S. government had a duty to secure Peruvian guano (bird droppings) at a reasonable price. When bird poop becomes a matter of national policy, you know raw materials are driving the global economy.

Three things drove economic imperialism in this era: natural resources, new markets for manufactured goods, and low-wage colonial labor.

Technological Developments: Railroads, Steamships, and the Telegraph

New transportation and communication technology made it possible to move colonial resources to industrial centers fast and cheap. The Industrial Revolution wasn't just about factories.

Railroads

• Before railroads, colonies relied on water transport or poorly maintained roads that often washed out in rainy seasons.
• Railroads cut the cost of moving raw materials from colonial interiors to coastal ports, and opened interior markets to European manufactured goods.
• In India, Britain built a complex railway network running from the interior to the coasts. Europeans claimed railroads proved imperialism helped colonized peoples, but the networks primarily served the colonizers' extraction needs.
• Cecil Rhodes (1853-1902), founder of De Beers Diamonds, pushed a railroad project from Cape Town, South Africa to Cairo, Egypt to link Britain's African colonies. It was never completed because Britain never controlled all the land along the route.
• African railway workers were overwhelmingly natives paid far less than European workers. Railroads were a tool for extracting maximum resources at minimum labor cost.

Steamships

• Early steamships burned huge quantities of coal, so they could only travel limited distances, mostly on navigable rivers like the Ganges in South Asia and the Congo in Africa.
• More efficient steam engines after 1870 made long ocean voyages practical.
• Compression refrigeration, developed in the 1870s, let perishables like meat and dairy cross oceans for the first time.

Telegraph

• Invented in 1832, the electric telegraph made news travel instantly instead of taking weeks or months.
• India got telegraph service in 1850, only five years after Britain. Lines often followed railroad routes.
• Submarine cables connected continents: the first permanent transatlantic cable linked the U.S. and England in 1866, England-Australia service started in 1872, and Portugal-Brazil service in 1874 connected Europe and South America.

Agricultural Products: From Subsistence Farming to Cash Crops

Before imperial control, most farmers in Asia and Africa practiced subsistence farming, growing just enough food to live on with maybe a little to sell. Imperial powers pushed them to grow cash crops instead. These are crops grown for commercial value, not for the farmers to eat: tea, cotton, sugar, oil palms, rubber, and coffee.

The damage was real. As cash crops replaced food crops, food prices rose in colonized nations.

Two other agricultural exports to know:

• Meat. Europe's growing middle classes wanted meat. Cattle ranches in Argentina, Brazil, and Uruguay exported beef, while Australia and New Zealand exported lamb and mutton. Refrigerated steamships and canning made it all shippable.
• Guano. Bat and seabird excrement rich in nitrates and phosphates, making it an excellent natural fertilizer. The dry climates of Peru and Chile let huge deposits accumulate. Between 1840 and 1880, millions of tons were dug by hand, often by indentured Chinese or Polynesian laborers, and shipped abroad.

Raw Materials: Cotton, Rubber, Palm Oil, Ivory, Minerals, and Diamonds

Industrial demand turned colonies into export economies, places where commercial extraction of natural resources for foreign markets defined the whole economy. Imperial attention focused on tropical climates where these raw materials grew.

Cotton

• Parliament banned Indian cotton textiles in 1721 to protect Britain's wool industry. The pattern was set: colonies supply raw materials, England manufactures textiles.
• During the Industrial Revolution, 80 percent of the cotton in Britain's textile mills came from the United States.
• The American Civil War changed everything. Northern warships blockaded Confederate ports, cutting off the cotton supply, so farmers from Australia to the West Indies switched from food to cotton.
• Egypt benefited most. It had already developed a fine long-staple cotton variety and ramped up production. By the end of the 19th century, 93 percent of Egypt's export revenue came from cotton.

Rubber

• Natural rubber comes from latex sap, but it softens when warm and hardens when cold. Charles Goodyear's vulcanization process (1839) fixed those problems and created the modern rubber industry (tires, hoses, waterproof clothing, shoe soles).
• The two original sources were wild trees in the Amazon rainforest and vines in Central Africa, each supplying about half the world's rubber. In both regions, "rubber barons" forced indigenous people into virtual slavery, and some companies mutilated or killed workers who missed quotas.
• In 1876, the British India Office obtained rubber tree seeds from Brazil, propagated them in England, and sent seedlings to Ceylon (Sri Lanka) and Singapore. Thousands of acres of forest were cleared for rubber plantations in Malaya, Indochina, and the Dutch East Indies.

Palm Oil

• Europe's factory machinery needed constant lubrication, and palm oil was also used for candles.
• The oil palm originated in West Africa, where it had been a staple food for 5,000 years and was so valued it served as money in many cultures.
• It became a major West African cash crop, often worked by enslaved prisoners of tribal wars. Europeans later set up oil palm plantations in Malaya and the Dutch East Indies.

Ivory

• Elephant tusks supplied ivory, prized for piano keys, billiard balls, knife handles, and carvings. African elephants of both sexes have large tusks averaging six feet, so most of the trade was with Africa.
• The European scramble for ivory in the mid-19th century actually preceded the scramble for colonies. The Ivory Coast (Côte d'Ivoire) got its name from French trading posts set up to buy ivory and enslaved people.

Minerals

• Mexico: silver
• Chile: copper (used for telegraph cables and electrical lines)
• Northern Rhodesia (now Zambia) and the Belgian Congo: copper
• Bolivia, Nigeria, Malaya, and the Dutch East Indies: tin (for canned food)
• Australia, South Africa, parts of West Africa, and Alaska: gold

Diamonds and Cecil Rhodes

• Rhodes went to South Africa in 1870 for his health, joined the Kimberley diamond rush in 1871, and formed the De Beers Mining Company in 1880. By 1891, De Beers controlled 90 percent of the world's diamond production.
• He also held a large stake in the world's largest gold fields, discovered on South Africa's Witwatersrand in 1886.
• Rhodes was elected to the Cape Parliament at 29 and became prime minister of the Cape Colony in 1890. He pushed British expansion north into Bechuanaland (Botswana) and Rhodesia (now Zimbabwe and Zambia), dreaming of that Cape-to-Cairo railroad with British claims along the whole route.
• His racist policies as prime minister paved the way for apartheid, the system of racial segregation that plagued South Africa in the 20th century.

Global Consequences: Monocultures and Environmental Damage

Commercial extraction left lasting scars on colonized economies and environments. As industrialized nations grew wealthier, stock exchanges developed, more people invested capital, and the pressure to protect global markets and investments grew.

The environmental costs:

• Farmers were allowed to raise only cash crops like sugar, cocoa, or groundnuts. This created monocultures, a lack of agricultural diversity.
• Forests were cleared for farmland, damaging biodiversity and the climate.
• Cash crops like cotton rapidly depleted soil fertility, and crop diseases and pests spread easily through single-crop regions.

The long-term result: many former colonies still can't rediversify their land use because monocultures damaged croplands so badly. They often must import basic agricultural goods to feed their own people. That's the through-line to remember for essays: extraction economies built for the colonizer's benefit left lasting structural problems for the colonized.

Key Terms to Know

Practice and Next Steps

Pair these notes with the 6.4 Global Economic Development course topic study guide for the College Board framing, then keep moving through the chapter sequence: 6.3 Indigenous Responses to State Expansion comes before this topic, and 6.5 Economic Imperialism builds directly on it. The full set of chapters lives on the AP World AMSCO notes page.

To check yourself, run Unit 6 questions in guided practice and review definitions in the AP World key terms glossary. When you're ready to write, try a prompt from the FRQ practice tool using the export-economy examples from this chapter (Egyptian cotton, Amazon and Congo rubber, Peruvian guano) as evidence.