What you'll learn
In plain words: Europeans crossed the oceans mostly to get rich through trade.
Why did small European kingdoms send ships across unknown oceans in the 1400s and 1500s? Why did they build empires in the Americas, Africa and Asia? The answer is mostly economic. They wanted profitable trade, gold and silver, land and labor. In this lesson you will learn:
- the economic motives and technology behind the Age of Exploration;
- the theory of mercantilism and laws such as the Navigation Acts;
- the Columbian Exchange of crops, animals and diseases;
- the triangular trade and the Atlantic slave trade;
- how different colonial economies worked, including the economies of the 13 British colonies.
How it appears on the GED: Expect flow maps of trade routes, tables of voyages or goods, and short readings about mercantilism. Questions ask you to:
- trace a route;
- identify a cause or effect;
- tell a goal apart from a result; or
- calculate a simple balance of trade.
Many of these topics involve great human suffering, such as enslavement and epidemics. So the GED also checks that you can tell who benefited and who paid the cost.
Words to know
- mercantilism — the theory that a nation grows rich by exporting more than it imports and collecting gold and silver; colonies exist to benefit the home country.
- balance of trade — exports minus imports (exports 900, imports 640 → surplus of 260).
- favorable balance (trade surplus) — exports greater than imports.
- bullion — gold and silver in bars or bulk.
- raw materials — unprocessed natural goods (timber, cotton, tobacco leaves).
- manufactured goods — finished products made from raw materials (cloth, tools).
- Navigation Acts — English laws (from 1651) controlling colonial shipping and trade.
- enumerated goods — colonial products that could be shipped only to England or its colonies (tobacco, sugar).
- joint-stock company — a business owned by many investors who buy shares and share profit and risk (Virginia Company).
- middleman — a trader who buys from one party and resells to another at a higher price.
- Columbian Exchange — the transfer of plants, animals, people and diseases between the hemispheres after 1492.
- triangular trade — the Atlantic trade linking Europe, Africa and the Americas.
- Middle Passage — the forced voyage of enslaved Africans across the Atlantic.
- plantation — a large farm growing one cash crop, usually with forced or enslaved labor.
- cash crop — a crop grown to sell rather than to eat (tobacco, sugar, cotton).
- encomienda — a Spanish system granting colonists the labor of Indigenous people.
1. Why Europeans explored
In plain words: Europeans wanted Asian spices and silk without paying so many traders along the way.
Economic motives. Spices (pepper, cinnamon, cloves), silk and porcelain from Asia were in high demand in Europe. These goods traveled the Silk Road and Indian Ocean routes. They passed through many middlemen — traders who buy and then resell at a higher price. Each middleman added to the price. Think of a product that passes through several shops before it reaches you.
Venice and other Italian city-states controlled much of the Mediterranean end of this trade. In 1453, the Ottoman Turks captured Constantinople. After that, Ottoman control of key routes increased. The Atlantic kingdoms — Portugal, Spain, and later England, France and the Netherlands — wanted a direct sea route to Asia. That way they could cut out the middlemen.
Other motives: spreading Christianity, and winning fame and royal favor. People sum these up as "God, gold and glory."
Technology: New tools made long voyages possible:
- the caravel, a light, quick sailing ship;
- the magnetic compass, which shows direction;
- the astrolabe, which used the sun and stars to help sailors find how far north or south they were;
- better maps.
Prince Henry of Portugal sponsored sailors and navigators.
| Year | Event |
|---|---|
| 1488 | Dias rounds the southern tip of Africa |
| 1492 | Columbus reaches the Caribbean while seeking Asia |
| 1498 | Da Gama reaches India by sea |
| 1519–1522 | Magellan–Elcano expedition sails around the world |
Example: A question may ask why Portugal explored the coast of Africa. The best answer is to find a sea route to Asian spices. It was not to colonize the Americas.
2. Mercantilism and colonial control
In plain words: Mercantilism said a country gets rich by selling more than it buys. Colonies exist to help the home country.
Mercantilism ruled European economic thinking from the 1500s to the 1700s. Picture a shop owner who wants cash flowing in and never out. Its main ideas:
- Wealth = gold and silver, and the world's supply is limited.
- A nation should export more than it imports to bring in gold and silver.
- Colonies supply raw materials cheaply. They also buy the home country's manufactured goods.
- Governments should control trade to protect these advantages.
Spain grew rich from American silver, especially from the great mine at Potosí (in today's Bolivia). Spain used forced labor by Indigenous people.
England passed the Navigation Acts (beginning 1651). Colonial trade had to use English or colonial ships. Enumerated goods (listed products, such as tobacco and sugar) could go only to England. Colonists often smuggled — traded in secret to dodge the rules. After 1763, Britain enforced the rules more strictly and added new taxes (Sugar Act, Stamp Act). This fueled the anger that led to the American Revolution.
In 1776 the Scottish economist Adam Smith published The Wealth of Nations. He argued that free trade and competition create wealth, not hoarding gold. His ideas became the basis of modern market economics.
Example: A kingdom exports £900,000 of goods and imports £640,000. Balance of trade = 900,000 − 640,000 = £260,000 surplus. That is a "favorable" balance in mercantilist terms.
3. The Columbian Exchange
In plain words: After 1492, plants, animals and germs crossed the Atlantic in both directions. The effects were huge.
After 1492, the two hemispheres exchanged living things that had been apart for thousands of years. Think of a plate of potato fries with tomato ketchup. Both potatoes and tomatoes first came from the Americas.
| Americas → Eastern Hemisphere | Eastern Hemisphere → Americas |
|---|---|
| Maize, potatoes, sweet potatoes, tomatoes, beans, squash | Wheat, rice, sugarcane, coffee, bananas |
| Cacao, peanuts, chili peppers, vanilla | Horses, cattle, pigs, sheep, chickens |
| Tobacco | Smallpox, measles, influenza, malaria |
Effects:
- Population growth in Europe, Africa and Asia. High-calorie American crops fed more people (potatoes in Ireland, maize in Africa, sweet potatoes in China).
- Population collapse in the Americas. Indigenous peoples had no immunity to Old World diseases. In some regions, their numbers fell by as much as 90% within a century.
- New ways of life. Horses transformed the Plains peoples. Cattle ranching spread across the Americas.
- Plantation economies. Europeans wanted sugar, and this drove huge plantations in the Caribbean and Brazil. Indigenous laborers died in great numbers. So colonists turned to enslaved Africans.
Example: "Which effect of the Columbian Exchange increased demand for enslaved labor?" → the spread of sugarcane plantations, combined with the deaths of Indigenous workers from disease.
4. The triangular trade and colonial economies
In plain words: Ships carried goods, enslaved people and crops around a three-sided loop across the Atlantic.
The triangular trade (1500s–1800s):
- Europe → Africa: manufactured goods (cloth, guns, metal goods, rum).
- Africa → Americas: enslaved Africans. This forced voyage was the Middle Passage. About 12.5 million people were forced onto ships. Roughly 10.7 million survived the voyage.
- Americas → Europe/New England: sugar, molasses, tobacco, rice, cotton.
The trade made merchants, shipbuilders and planters rich. It devastated African societies and brought lifelong bondage to millions.
Colonial economies of British North America. Each region's land and climate shaped how people made a living.
| Region | Geography | Economy |
|---|---|---|
| New England | Rocky soil, long winters, good harbors | Fishing, shipbuilding, trade, small farms; rum distilling |
| Middle Colonies | Fertile soil, moderate climate | Wheat and grain ("breadbasket"), trade through Philadelphia and New York |
| Southern Colonies | Long growing season, rich soil | Plantations growing tobacco, rice and indigo with enslaved labor |
Joint-stock companies made many colonies possible. Many investors each bought shares. So they shared the cost and the risk. It is like friends splitting the cost of a food truck and sharing its profits. Examples include the Virginia Company's Jamestown (1607) and the Dutch and English East India companies.
Example: 200 shares, £10,000 profit → £50 per share. An investor with 5 shares receives £250.
Calculations you may need
- Balance of trade: exports − imports (positive = surplus, negative = deficit).
- Profit per share: total profit ÷ number of shares; multiply by shares owned.
- Percent of a total: part ÷ whole × 100 (10.7 ÷ 12.5 ≈ 86% of captives survived the Middle Passage; about 14% died).
- Percent decrease: (old − new) ÷ old × 100 (a population falling from 100 to 10 is a 90% decrease).
Example 1: Reading a trade-route map
Stimulus: A map shows arrows: England → West Africa ("textiles, guns"); West Africa → Caribbean ("enslaved people"); Caribbean → New England ("molasses"); New England → England ("rum, timber").
Question: Which product was most likely made in New England from a Caribbean import?
Think aloud:
- Caribbean → New England carries molasses.
- New England → England carries rum and timber.
- Rum is made from molasses (a sugar product). Timber is a local raw material.
- Answer: rum. Eliminate textiles (from England) and timber (not made from an import).
Example 2: Applying mercantilism
Stimulus: "In 1699 Parliament passed the Wool Act, forbidding the colonies to export wool or woolen cloth to other colonies or countries."
Question: How does this law reflect mercantilism?
A. It encouraged colonies to develop their own industries. B. It protected English cloth makers by keeping colonial cloth off the market. C. It promoted free trade among colonies. D. It lowered prices for colonial consumers.
Think aloud: Mercantilism wants colonies to buy the home country's finished goods, not compete with them. Banning colonial wool exports protects English manufacturers → B. A and C are the opposite; D is unlikely since limiting competition usually raises prices.
Example 3: Goal versus result
| Stimulus: | Explorer | Goal | Result |
|---|---|---|---|
| Columbus (1492) | Reach Asia by sailing west | Reached the Caribbean | |
| Da Gama (1498) | Reach India by sea | Reached India |
Question: Which explorer achieved his goal?
Think aloud: Compare columns row by row. Columbus's result does not match his goal (he believed he had reached Asia, but he had not). Da Gama's matches → da Gama. Trap: Columbus is more famous, so test-takers pick him without checking the columns.
Example 4: Who gained and who lost?
Stimulus: "European demand for sugar grew rapidly in the 1600s. Planters in Brazil and the Caribbean expanded sugar plantations, and the number of enslaved Africans brought to those regions rose sharply."
Question: Which relationship does the text describe?
Think aloud: The chain is demand → plantation expansion → more enslaved labor. Answer: rising European demand for sugar increased the forced migration of enslaved Africans. Eliminate choices that reverse the chain ("the slave trade caused Europeans to want sugar") or that add claims the text does not make ("sugar prices fell").
Common mistakes
- Mixing up exchange directions. Potatoes, maize, tomatoes and tobacco came from the Americas; horses, cattle, wheat, sugarcane and smallpox went to the Americas.
- Treating a result as a goal. Columbus's goal was Asia; reaching the Americas was the result.
- Thinking mercantilism means free trade. It means government-controlled trade that benefits the home country. Free trade is Adam Smith's later idea.
- Reversing the triangular trade. Enslaved people went from Africa to the Americas; crops went from the Americas to Europe.
- Ranking causes wrongly. Disease, not warfare, was the main cause of Indigenous population decline.
- Believing Magellan personally circled the globe. He died in 1521; his expedition finished under Elcano.
GED test strategy
- On flow maps, follow the arrowheads and say each route aloud in your head: "from ___ to ___, carrying ___."
- In tables, compare columns row by row (goal vs. result, exports vs. imports).
- Look for cause-and-effect chains (demand → plantations → enslaved labor) and make sure the answer keeps the order.
- Watch signal words that rank causes (main, added to) and absolute words (only, all).
- For two-part answers, both parts must be correct—solve the number first, then check the reasoning.
- Use your background knowledge to read faster, but choose answers the source supports.
Check yourself
The Triangular Trade
(1) From the 1500s to the 1800s, ships linked Europe, Africa and the Americas in a system of trade often called the triangular trade. The map shows its three main routes.
(2) European merchants carried manufactured goods to West Africa and traded them for enslaved people. The forced voyage of enslaved Africans across the Atlantic to the Americas was called the Middle Passage. Captives were chained below deck for weeks in crowded, filthy conditions. Historians estimate that about 12.5 million Africans were forced onto slave ships and that roughly 10.7 million survived the voyage.
(3) In the Americas, enslaved people were forced to work on plantations growing sugar, tobacco, rice and, later, cotton. Ships then carried these crops—and molasses, a sugar product used to make rum—to Europe and to New England. Colonial and European merchants grew rich, while enslaved Africans received nothing for their labor.
According to the map, what was carried from West Africa to the Americas?
Hint
Find the arrow that starts at West Africa and points to the Americas.
Step-by-step solution
On the map, Route 2 starts at West Africa and points to the Americas. Its label reads "Enslaved Africans." Paragraph 2 confirms this: "The forced voyage of enslaved Africans across the Atlantic to the Americas was called the Middle Passage."
The answer is enslaved Africans.
The other choices come from the other two routes: cloth and guns went from Europe to Africa (Route 1), and sugar and tobacco went from the Americas to Europe (Route 3).
Tip: on a flow map, the arrowhead shows direction. Trace each arrow from its tail (start) to its head (end) before reading its label.
Check yourself
The Triangular Trade
(1) From the 1500s to the 1800s, ships linked Europe, Africa and the Americas in a system of trade often called the triangular trade. The map shows its three main routes.
(2) European merchants carried manufactured goods to West Africa and traded them for enslaved people. The forced voyage of enslaved Africans across the Atlantic to the Americas was called the Middle Passage. Captives were chained below deck for weeks in crowded, filthy conditions. Historians estimate that about 12.5 million Africans were forced onto slave ships and that roughly 10.7 million survived the voyage.
(3) In the Americas, enslaved people were forced to work on plantations growing sugar, tobacco, rice and, later, cotton. Ships then carried these crops—and molasses, a sugar product used to make rum—to Europe and to New England. Colonial and European merchants grew rich, while enslaved Africans received nothing for their labor.
Click the numbered route on the map that shows the Middle Passage.
Click on the figure to mark your answer (or focus it and use the arrow keys).
Hint
Paragraph 2 defines the Middle Passage. Which route matches that definition?
Step-by-step solution
Paragraph 2 defines the term: "The forced voyage of enslaved Africans across the Atlantic to the Americas was called the Middle Passage."
On the map, Route 2 runs from West Africa across the Atlantic to the Americas and is labeled "Enslaved Africans." That is the Middle Passage.
Route 1 (Europe → West Africa) was the first leg, carrying manufactured goods. Route 3 (Americas → Europe) was the last leg, carrying plantation crops. The Middle Passage got its name because it was the middle leg of the three-part voyage.
Tip: when a question uses a special term, find where the passage defines it, then match the definition's key details (who, from where, to where) to the map.
Summary
- Europeans explored mainly to reach Asian trade goods by sea and skip the middlemen. New ship and navigation tools helped ("God, gold and glory").
- Mercantilism: export more than you import, and collect gold and silver. Use colonies for raw materials and markets. England's Navigation Acts enforced it, and smuggling and anger followed.
- The Columbian Exchange moved crops, animals and diseases between hemispheres. Populations grew abroad, while Indigenous populations collapsed.
- The triangular trade linked European goods, enslaved Africans (the Middle Passage) and American plantation crops.
- Colonial economies varied by region. Joint-stock companies spread the cost and risk of colonization.