AMSCO 1.4 Developments in the Americas Notes

Overview

AMSCO Topic 1.4, "Developments in the Americas" (AMSCO pages 33-39), covers the major American civilizations of c. 1200-1450: the Mississippian culture in North America, the Maya city-states, the Aztec Empire in Mesoamerica, and the Inca Empire in the Andes. The big takeaway for AP World is that state systems in the Americas, just like in Afro-Eurasia, showed continuity, innovation, and diversity while expanding in scope and reach. These civilizations built strong states, large urban centers, and complex belief systems entirely on their own, with no contact with Europe or Asia.

What we know about them comes from a mix of archaeology, oral traditions, and writings recorded by Europeans after 1492, including poetry by the Aztec writer Nezahualcoyotl.

Timeline of Key Events in Ancient American Civilizations. Image Courtesy of Riya Patel

The Mississippian Culture and the Southwest

The Mississippian culture was the first large-scale civilization in North America, emerging in the 700s or 800s in the Mississippi River Valley. Instead of stone pyramids, Mississippians built enormous earthen mounds, some up to 100 feet tall and covering an area the size of 12 football fields. The largest mound site is Cahokia, in southern Illinois.

Government and society

• A chief called the Great Sun ruled each large town.
• Rigid class structure: priests and nobles on top, then farmers, hunters, merchants, and artisans, with enslaved people (usually prisoners of war) at the bottom.
• Society was matrilineal, meaning social standing passed through the woman's side of the family. When a Great Sun died, the title went to his sister's son, not his own.
• Generally, women farmed and men hunted.

Decline

Cahokia was abandoned around 1450, and other large Mississippian cities by 1600. Historians debate why. One theory points to flooding or weather extremes that wrecked the agricultural economy. Another blames diseases introduced by Europeans.

Chaco and Mesa Verde

In the dry southwestern United States, two cultures became known for adapting to scarce water and wood:

• The Chaco built large housing structures out of stones and clay, some with hundreds of rooms.
• The people of Mesa Verde built multi-story homes into cliff sides using sandstone bricks.

Both declined in the late 13th century as the climate got drier.

The Maya City-States

Mayan civilization peaked between 250 and 900 C.E. across southern Mexico, Belize, Honduras, and Guatemala. Note the dates: the Maya peak comes before the course's 1200 start date, but AMSCO covers them because later Mesoamerican states built on Mayan foundations. At its height, the region held as many as 2 million Mayans living in or near roughly 40 cities of 5,000 to 50,000 people each.

Government

• The basic political unit was the city-state, each ruled by a king (women ruled when no male heir was available). There was no central government over all Mayan lands.
• City-states fought constantly, but rarely for territory. They fought for tribute (payments from the conquered to the conqueror) and for captives to use in human sacrifice ceremonies.
• Each king claimed descent from a god and directed elite scribes and priests who ran the state.
• Commoners paid taxes in crops and provided labor. There were no standing armies; citizens served when war broke out.

Religion, science, and technology

• The Maya developed the concept of zero, a complex writing system, and rubber made from plant sap.
• Science and religion were linked through astronomy. Priests used the calendar to decide when to hold ceremonies and whether to go to war, so they built precise observatories atop pyramids like the one at Chichen Itza. Their calendar was more accurate than any in Europe at the time.
• Priests, who could be male or female, honored deities of the sun, rain, and corn. War captives were sometimes sacrificed as offerings.
• Mayan stepped pyramids resemble Mesopotamian ziggurats, a shape that shows up from Spain to Indonesia.

The Aztec Empire

The Aztecs (also called the Mexica) were originally hunter-gatherers who migrated into central Mexico in the 1200s. In 1325 they founded their capital, Tenochtitlan, on the site of modern Mexico City. Within a century they had built an empire stretching from the Gulf of Mexico to the Pacific Ocean.

Tenochtitlan

• Built on an island in a swampy lake for defense, the city grew to nearly 200,000 people, one of the largest cities in the world.
• Aqueducts supplied water, and a 150-foot Great Pyramid anchored the city center.
• On Lake Texcoco, the Aztecs built chinampas, floating gardens that expanded farmland. They dug ditches to irrigate fields and drain lake water for more land.

Government, economy, and society

Here's the key idea: the Aztecs ruled through tribute, not direct control. Conquered peoples paid tribute (food, cloth, firewood, plus luxury goods like feathers and jewelry), surrendered land, and performed military service. Local rulers kept their positions and served as tribute collectors, which gave the Aztecs political dominance without administrative control.

• City-states were grouped into provinces. Warriors and their families were relocated to each provincial capital, and an Aztec official collected tribute there.
• The government was a theocracy, rule by religious leaders. The emperor, called the Great Speaker, was both political ruler and divine representative of the gods.
• Social hierarchy below him: land-owning nobles (who led the military), then scribes and healers, then craftspeople and traders (including the pochteca, a special merchant class trading luxury goods), then peasants and soldiers. People could be enslaved for unpaid debts or as punishment for crimes.

Religion and the role of women

• The Aztecs worshipped hundreds of deities, many with both male and female aspects.
• Human sacrifice repaid the gods, who Aztecs believed had sacrificed themselves to create the world. Sacrifice also had a political side, dramatically displaying Aztec might. Spanish invaders may have exaggerated its extent to justify conquest.
• Women wove the cloth that local rulers demanded as tribute, so they were central to the tribute economy. Most women worked at home, but some became priestesses, midwives, healers, or merchants, and a few noblewomen worked as literate scribes.

Decline

By the late 15th century the empire was weakening. Low technology (no wheeled vehicles or pack animals) made agriculture inefficient, the empire expanded beyond what it could govern, and the constant demands for tribute and sacrifice victims bred resentment. Many subject tribes were ready to rebel, which is exactly the opportunity the Spanish exploited after arriving in 1519.

The Inca Empire

In 1438, a leader who called himself Pachacuti ("transformer" or "shaker" of the earth) began conquering tribes near Cuzco, Peru. His victories, and his son's, built the Incan Empire, which stretched from present-day Ecuador to Chile. By 1493 his grandson Huayna Capac ruled and focused on consolidating the conquests.

Government, economy, and society

• The empire was split into four provinces, each with its own governor and bureaucracy. Loyal conquered leaders were rewarded.
• Unlike the Aztecs, the Inca did not demand tribute. Instead, conquered people owed the mit'a system: mandatory public service. Men aged 15 to 50 provided agricultural and other labor, including road construction. Tribute vs. mit'a is a classic AP comparison, so know the difference.

Religion

• Inca means "people of the sun," and the sun god Inti was the most important deity. Rulers were considered Inti's earthly representatives. The Temple of the Sun in Cuzco was the core of Incan religion.
• Royal ancestor veneration: dead rulers were mummified and kept "ruling," retaining their servants, possessions, and property. New rulers inherited nothing, which partly motivated constant expansion.
• Priests read the gods' will (coca leaves, spider movements), diagnosed illness, and predicted battles. Human sacrifice happened during serious events like famines and plagues, though scholars think it was less frequent than among the Aztecs.
• Incan religion included animism, the belief that physical objects (called huaca) like mountains, rivers, stones, or bridges could hold supernatural power.

Achievements

• The quipu, a system of knotted strings, recorded numerical information and messages.
• Terrace farming grew potatoes and maize, using waru waru, raised beds with channels that captured rainwater, prevented erosion, and stored water for dry periods.
• The Carpa Nan, a roughly 25,000-mile road system built with captive labor, served the government and military, with bridges crucial in the mountains.

Decline

When Spanish conquistador Francisco Pizarro arrived in 1532, the empire was in a civil war of succession after Huayna Capac's death. Some scholars say the civil war weakened the army; others point to European diseases. The Spanish took the empire's core in 1533, though outposts held out until 1572. Machu Picchu remains one of the world's most visited sites.

Continuities and Diversity

Historians debate how connected Mesoamerican cultures were. Many argue most built on the Olmec civilization, since the Olmecs' feathered snake-god became fundamental to both Mayan and Aztec religion, and Olmec pottery subjects, ritual sacrifices, pyramids, and ball courts continued in later cultures. Other historians argue these civilizations developed complex societies more or less independently. Either way, the pattern matches the rest of Unit 1: states demonstrating continuity with earlier traditions while innovating in their own directions.

Key Terms to Know

Practice and Next Steps

Pair these notes with the 1.4 State Building in the Americas study guide for the course-topic version of this material, and browse the full set of AP World AMSCO notes to keep moving through Unit 1. The next chapter, AMSCO 1.5 Developments in Africa, continues the regional tour, and AMSCO 1.7 pulls all the Unit 1 regions together for comparison.

To check yourself, run a quick set of AP World practice questions on state building in the Americas, or look up any fuzzy term in the key terms glossary. The Aztec tribute system vs. the Incan mit'a system is a comparison the exam loves, so make sure you can explain both before moving on.