Trace how European exploration and colonization of Central and South America from the 1400s to the 1700s transformed the hemisphere and left impacts we can observe today

Learning goal: Explain how European exploration and colonization in Central and South America during the 1400s through the 1700s transformed the Western Hemisphere, and identify impacts of those interactions that can be observed today. This lesson teaches Ohio's 2026 social studies standard for Grade 5, published in July 2026. The Ohio Department of Education and Workforce anticipates that districts will begin implementing the 2026 standards in the 2027-28 school year.

Exploration and colonization. Exploration means traveling to learn about places and find routes, resources and wealth. Colonization means taking control of land and people and setting up settlements and government run from far away. In Central and South America, Spain and Portugal were the main colonizing powers. They came for three reasons often summarized as gold, glory and God: wealth (gold, silver, farmland, trade), power and fame for rulers and conquerors, and spreading Christianity.

The 1400s and 1500s: arrival and conquest. In 1492 Christopher Columbus, sailing for Spain, reached the Caribbean. In 1494 Spain and Portugal signed the Treaty of Tordesillas, which drew a line on the map dividing Spain's and Portugal's competing claims: lands to the west for Spain, to the east for Portugal. The Indigenous nations who lived in those lands were not parties to the agreement; that line is one reason Brazil became Portuguese. A Portuguese fleet under Pedro Álvares Cabral reached the coast of Brazil in 1500. The Mexica capital, Tenochtitlan, fell to Spanish forces and their Indigenous allies in 1521, and Spanish forces under Francisco Pizarro captured the Inca ruler Atahualpa in 1532 and took the capital, Cusco, in 1533. Diseases brought from Europe, such as smallpox, were new to the Americas. Because Indigenous communities had never been exposed to them, few people had any acquired resistance, and war, forced labor, hunger and displacement made outbreaks worse. Together these killed a very large share of the Indigenous population in the 1500s. Historians' estimates differ, but the losses were among the worst in human history.

The 1500s and 1600s: building colonial systems. Spain governed its lands through large districts called viceroyalties, each ruled by a viceroy for the king. The Viceroyalty of New Spain was created in 1535 with its capital at Mexico City, built on the ruins of Tenochtitlan. The Viceroyalty of Peru was created in 1542 with its capital at Lima. In Central America, Pedro de Alvarado led Spanish forces and Indigenous allies from central Mexico against the K'iche' and other Maya kingdoms of Guatemala in 1524. The Spanish founded Santiago de los Caballeros, today's Antigua Guatemala, at its present site in 1543. An audiencia (royal court and government) created for Central America in the 1540s sat there from 1549 and, apart from a few years in the 1560s, governed most of Central America under New Spain. In 1545 a huge silver deposit was found at Potosí, in present-day Bolivia. Indigenous men were forced to work in the mines through a labor draft the Spanish called the mita, adapted from an Inca labor system. The work was dangerous, and many workers were injured or died. Silver from Potosí and Mexico flowed to Spain and around the world. In Brazil, the Portuguese built sugar plantations along the coast, and when Indigenous labor was not enough, they brought enslaved Africans across the Atlantic in enormous numbers. Catholic missionaries built churches and missions and worked to convert Indigenous peoples, sometimes protecting them from settlers and sometimes forcing changes to their ways of life.

The 1700s: a changing colonial world. Colonization did not stop in 1600. In the 1690s, gold was found in the Brazilian region of Minas Gerais, starting a gold rush in the 1700s that drew settlers and many more enslaved Africans inland. Brazil's colonial capital moved from Salvador to Rio de Janeiro in 1763, closer to the gold routes. Spain reorganized its empire, creating the Viceroyalty of New Granada (in present-day Colombia and nearby lands), first in 1717 and permanently in 1739, and the Viceroyalty of the Río de la Plata, with its capital at Buenos Aires, in 1776. In 1767 Spain expelled the Jesuit religious order from its colonies, closing many missions. Colonial society was ranked by birth and ancestry: Spaniards born in Spain held the highest offices, American-born people of Spanish descent (criollos) came next, and people of mixed ancestry, Indigenous people and Africans were placed lower. Anger at heavy taxes and forced labor exploded in 1780, when Túpac Amaru II, an Indigenous leader who claimed descent from the Inca rulers, led a large rebellion in Peru. Túpac Amaru II was captured and executed in 1781, and Spanish forces put down the last of the fighting within about two years, but the rebellion showed how deep the conflicts of colonial society had become.

How the hemisphere was transformed. By 1800, three centuries of colonization had changed who lived in the region, what languages they spoke, what religions they practiced, what crops and animals filled the land (horses, cattle, wheat and sugarcane came from the Eastern Hemisphere), and how land and labor were controlled. Indigenous peoples and Africans were not only victims: they resisted, rebelled, kept languages and traditions alive, and blended them with new ones.

Impacts we can observe today. Spanish is the main language of most of Central and South America, and Portuguese is spoken in Brazil. Most people in these nations are Christian, mainly Catholic. Many cities still have a central plaza with a church and government buildings, a plan the Spanish used across their colonies. Quechua and other Indigenous languages are still spoken by millions, and in Guatemala more than twenty Maya languages are spoken today. Antigua Guatemala, the colonial capital of Central America until earthquakes in 1773 led the government to move to today's Guatemala City in 1776, keeps its colonial grid of streets, plaza and churches and is a World Heritage Site. Afro-Brazilian music, food and religion, such as samba and Candomblé, grew from African traditions. Many national borders follow the lines of old colonial districts.

The misconception. Students sometimes think colonization "happened" in 1492 and was finished soon after. In fact it was a process lasting more than three hundred years that kept changing, and its effects are still visible.

Worked example 1 — order the events: Put these in order and state the century: Túpac Amaru II rebellion; Potosí silver found; Treaty of Tordesillas; Rio de Janeiro becomes Brazil's capital; fall of Tenochtitlan. Solution: Treaty of Tordesillas, 1494 (1400s); fall of Tenochtitlan, 1521 (1500s); Potosí silver found, 1545 (1500s); Rio de Janeiro becomes capital, 1763 (1700s); Túpac Amaru II rebellion, 1780 (1700s). The student notes that two of the five events fall in the 1700s, so the story of colonization continues well past the 1500s.

Worked example 2 — cause and effect chain: Question: how did gold in Minas Gerais transform Brazil? Chain: gold found in the 1690s → settlers and enslaved Africans moved inland in the 1700s → towns grew in the interior → the capital moved to Rio de Janeiro in 1763, closer to the gold routes → today Brazil's population, culture and major cities reflect this shift, including a large population of African descent. Each link is stated as a cause leading to an effect, and the last link names an impact observable today.

Worked example 3 — observe an impact today and trace it back: Observation: in Lima, Peru, the main square is surrounded by a cathedral and government buildings. Trace: Lima was founded by the Spanish in 1535 and became the capital of the Viceroyalty of Peru in 1542; Spanish colonial towns were commonly built around a central plaza with the church and government offices facing it. Conclusion: the plaza is a physical impact of colonization that can be observed today. Limit: the buildings now standing may have been rebuilt after earthquakes, so the plan is colonial even where a particular building is newer.

Timeline and impact chart (representation task): Make a timeline from 1492 to 1800 with at least eight events from the lesson, placing each correctly and labeling the century. Below it, draw a two-column chart: in the left column list four transformations, chosen from language, religion, labor, crops and animals, and government; in the right column, for each, write one impact that can be observed today.

Independent performance: Write an explanation of 200–300 words answering: "How did European exploration and colonization from the 1400s to the 1700s transform Central and South America, and what impacts can we still see?" Success criteria: (1) you include at least one event from each of the 1400s, 1500s, 1600s and 1700s with correct dates; (2) you name both Spain and Portugal and at least one place in Central America and one in South America; (3) you describe one way Indigenous peoples or Africans were forced to work and one way they resisted or preserved their culture; (4) you identify two impacts observable today and connect each to its colonial cause; (5) you avoid describing the lands as empty before Europeans arrived.