The Transatlantic Slave Trade Begins | World Builders Academy | Studio Aletheia
World Builders Academy spinning glass orb Studio Aletheia · World Builders Academy 6.3.PSC 6th Grade World Civilizations

The Transatlantic Slave Trade Begins

Lesson 4.18 · Origins of a Devastating System

European colonists first tried to force Indigenous peoples, then European indentured servants, to labor on American plantations. Both attempts failed, at horrific human cost. What followed was a system that would forcibly transport twelve million people across an ocean.

Focus Origins · Labor Systems · Historical Development
Accountability Cause and Effect Chart + Exit Ticket
Indicator Distinguish historical developments based on time and place...
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Learning Targets

Learning Targets and Success Criteria

Build the vocabulary and evidence needed to meet standard 6.3.P.

Targets

What I will learn

  • I can explain why Indigenous enslavement failed to meet European colonists' labor demands.
  • I can explain why European indentured servitude also failed to meet plantation labor needs.
  • I can describe the first Portuguese shipments of enslaved Africans to the Americas.
  • I can distinguish the specific time period and circumstances that gave rise to the Transatlantic Slave Trade.
Success Criteria

What success looks like

  • I explain why disease caused catastrophic Indigenous population loss on islands like Hispaniola.
  • I describe at least one reason European indentured servants could not meet colonial labor demands.
  • I explain when and where the first large shipment of enslaved Africans arrived in the Americas.
  • My exit ticket distinguishes this system from the trans-Saharan slave trade discussed in Lesson 4.17.
Standard 6.3.P

Summarize the impact of the Transatlantic Slave Trade on ideological, political, and social systems in the Atlantic World.

Distinguish historical developments based on time and place.
Vocabulary

Pulling twenty-five lessons into one argument.

These terms will be used throughout the mini-lesson, evidence lab, hands-on activity, journal, and exit challenge.

01 · Concept

Cash Crop

A crop, such as sugar, tobacco, or rice, grown specifically to be sold for profit rather than for the farmer's own use.

02 · Population

Taíno

The Indigenous people of Hispaniola, whose population fell from several hundred thousand to about thirty-two thousand by 1514 due to violence, forced labor, and disease.

03 · System

Indentured Servitude

A labor system in which a person works for a set number of years in exchange for passage or another benefit, ultimately failing to meet the scale of labor colonial plantations demanded.

04 · Concept

Forced Migration

The involuntary movement of people from their homeland, in this case the beginning of the largest forced migration in recorded history.

College & Career Connections

Where this shows up in the real world.

History is not just something that happened. It is training for how you will read evidence, weigh sources, and make decisions in a career.

Historical Demography

Measuring Population Change

Demographers who study historical population change analyze records like those from Hispaniola to understand the true scale of demographic collapse caused by disease and forced labor.

Labor Economics

Studying the Origins of Labor Systems

Labor economists studying the historical origins of forced and coerced labor systems trace how colonial planters moved from one failed labor source to the next before settling on the Atlantic slave trade.

Mini-Lesson

Two Failed Labor Systems, One Devastating Choice

European colonists did not turn to enslaved African labor first. They turned to it only after two other systems collapsed.

European colonists in the Americas needed enormous amounts of labor to grow the cash crops, especially sugar, that made colonization profitable. Their first attempt relied on enslaving Indigenous peoples, but this failed catastrophically. On the island of Hispaniola, where both Spanish and French colonists established sugar plantations, the Indigenous Taíno population, which had numbered at least several hundred thousand when Columbus arrived in 1492, had collapsed to only about thirty-two thousand by 1514. Some Taíno were killed outright by the Spanish, others died from brutal forced labor and poor conditions, but the vast majority died from infectious diseases their bodies had never encountered before.

European indentured servants, bound by contract to work a set number of years, also failed to solve the labor shortage. The hot, disease-ridden Caribbean climate produced extremely high death rates among European servants within their first year, discouraging further immigration, and tobacco planters in Virginia and Maryland faced similarly high mortality among their indentured workers. Legal changes, such as a 1664 French law restricting how planters could treat their indentured servants, also made this labor source less appealing to colonists focused purely on profit. Colonists increasingly concluded that indentured servitude simply could not supply labor on the scale their plantations demanded.

Europeans then turned to enslaved Africans, whom they wrongly believed were both better suited to hard physical labor and, having had longer historical contact with European diseases, more likely to survive them than Indigenous Americans. The Portuguese, who were already using enslaved Africans on sugar plantations off the African coast, were the first to bring large numbers of enslaved people to the Americas, transporting an initial two hundred captives to the Spanish colony of Santo Domingo in 1525. Within decades, the British, French, Spanish, Dutch, and Danes were all exporting captives from Africa to produce sugar, rice, indigo, and tobacco throughout the Americas, marking the beginning of what would become one of the largest forced migrations in human history.

Adapted from Studio Aletheia's World Builders Academy curriculum library, drawing on classical world history resources on the origins of the Transatlantic Slave Trade.

Check for Understanding · CFU 1
In one sentence, explain why European colonists turned to enslaved African labor only after Indigenous enslavement and European indentured servitude both failed.
Toolkit

Materials for the cause and effect chart.

  • A. Cause and Effect Chart, provided
  • B. Highlighters, 2 colors minimum
  • C. Notebook or chart paper
  • D. A pencil for annotating
  • E. Your Evidence Log
Non-negotiable routine

Every session this unit: identify the evidence, cite where it came from, connect it to the day's vocabulary, write a one-paragraph explanation.

Guided Practice

Trace the Labor Shift

Practice distinguishing the historical developments that led to the Transatlantic Slave Trade.

Cause and Effect Lab
Choose a sample piece of evidence, then complete the identification protocol.
1 · Identify
What time period and place does this piece of evidence describe?
2 · Connect
What earlier failed labor system does this piece of evidence connect to?
3 · Compare
How does this piece of evidence help explain why the Transatlantic Slave Trade began when and where it did?
4 · Defend
Explain your reasoning using at least one vocabulary term.
Hands-On

Build a Cause and Effect Chart

Trace the sequence of failed labor systems that led to the Transatlantic Slave Trade.

1
Sequence: On your chart, sequence Indigenous enslavement, European indentured servitude, and enslaved African labor in order.
2
Explain: For each system, write one sentence explaining why colonists ultimately abandoned or expanded it.
3
Cite: Cite the specific date and place of the first major Portuguese shipment of enslaved Africans.
4
Distinguish: Write two sentences distinguishing this new system from the trans-Saharan slave trade discussed in Lesson 4.17.
Required

Evidence Log: Entry 18

Explain the sequence of decisions and failures that led European colonists to the Transatlantic Slave Trade. Why is it important to understand this as a specific historical development, not something that was inevitable from the start?
Checklist

Accountability Checklist

Lesson 18 of 25 · Unit 4

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