APUSH · Period 1
— c. 1491 to c. 1607 —

Worlds collide.

Two hemispheres that had developed in isolation for ten thousand years suddenly weren’t anymore. The next century would kill more people, in absolute numbers, than any in recorded history — and forge the political, biological, and economic systems we still live with.

What you need to know

By 1491, the Western Hemisphere was home to as many as a hundred million people in societies as varied as the Aztec Triple Alliance, the Inca, the Mississippian mound-builders, the Iroquois Confederacy, and the Pueblo. Europe was emerging from feudalism — late-medieval kingdoms newly organized to project power across oceans. When Columbus’s voyages began the Columbian Exchange in 1492, the consequences flowed both ways: corn, potatoes, tomatoes, tobacco, syphilis, and (above all) silver out of the Americas; horses, wheat, sugar, smallpox, measles, and slavery in. Spain built the first transatlantic empire on indigenous labor and Andean silver. The English wouldn’t show up to stay until 1607.

Period topics (3)

The CED, topic by topic.

  • 1.1

    Native American Societies before European Contact

    A continent of difference, mapped by environment.
    GEO · SOC

  • 1.2

    European Exploration in the Americas

    Why Europe — and why not someone else.
    WOR · WXT

  • 1.3

    Columbian Exchange, Spanish Exploration, and Conquest

    Biology becomes destiny.
    GEO · MIG · SOC · NAT

1492 isn’t a date about Columbus. It’s the date the Atlantic stopped being a barrier and started being a system — one that would consume tens of millions of lives before it was done.— Mr. Jacobson, Period 1 Lecture

Connect to the bigger picture

Era page: The Early Modern World — for the global context (Ming, Ottoman, Iberian convergence)

APWH cross-link: Topic 4.3 Columbian Exchange — same story, world-history framing

Coming next: Period 2 Colonies Take Root — when “exploration” becomes “settlement”

Practice the skill — SAQ

Try this in 3 minutes.

Part A. Identify ONE specific way the Columbian Exchange transformed economies in either Europe or the Americas.

Part B. Explain ONE specific way the Columbian Exchange transformed societies in either Europe or the Americas.

Part C. Explain ONE limitation of describing the Columbian Exchange as a mutual exchange between Europe and the Americas.