The Great Dying (c. 1520 – 1700 CE)

What happened?

  • During the 1400s, between 54 and 61 million Indigenous Peoples lived in North, Central and South America. They engaged in agriculture, lived in complex and varied societies, managed their land, and supported their communities. Indigenous societies also lived in cities – for example, the Aztec capital Tenochtitlan in present-day Mexico.
  • In 1492, Christopher Columbus arrived in the Americas (image below), beginning an era of European colonialism that completely disrupted Indigenous ways of life. European colonists made war against Indigenous people and brought foreign flora and fauna that disrupted native ecosystems. Europeans spread diseases such as measles, smallpox, influenza, and the bubonic plague that ravaged Indigenous populations and their livestock, who had no natural immunity to them. Colonization resulted in the devastating loss of Indigenous life. Over the next two centuries, the Indigenous population was reduced to a mere 6 million people in an event known as the Great Dying. 

John Vanderlyn, American, 1775–1852. Landing of Columbus, 1847. Oil on canvas. United States Congress. CAPITOL ROTUNDA.

How is this related to climate? 

  • The loss of Indigenous lives greatly affected the environment and the land they lived on. With only about 10% of the Indigenous population of the Americas remaining, as much as about 55 million hectares of land that had been cleared and maintained for centuries went uncared for. Wild vegetation repopulated the land, leading to an increase in biomass that pulled carbon from the atmosphere. Atmospheric carbon levels dropped by seven to ten parts per million, as evidenced by high resolution ice cores, causing a drop of about 0.15℃ in global temperatures.

Global trends in atmospheric carbon dioxide (CO2). Graph A shows the CO2 concentrations over time recorded in two Antarctic ice cores: Law Dome (gray) and West Antarctic Ice Sheet Divide (blue). Graph B shows terrestrial uptake of carbon. The yellow box is the time span of the Great Dying event. Notice that COconcentrations decreased and terrestrial uptake of carbon increased during the Great Dying, indicating that plants were taking greater amounts of carbon out of the atmosphere (from Koch and others, 2019).

  • This drop in global temperatures may have slightly exacerbated the Little Ice Age, a period of widespread cooling and a drop in average global temperatures from around 1300 to 1850 CE.

Why is this important?

  • As an early example of anthropogenic, or human-caused, climate change, the Great Dying highlights several key points about how we think about current anthropogenic climate change and its mitigation:
    • The Great Dying shows that colonialism, along with industrialism, is one of the causes of climate change.
    • The Great Dying highlights the importance of centering Indigenous voices and knowledge in conversations about caring for the environment and addressing climate change. 
    • The Industrial Revolution is typically considered to be the start of anthropogenic climate change, but The Great Dying illustrates how agricultural practices, starting about 7000 years ago, were the first instances of humans affecting the climate. This idea was proposed by William Ruddiman in 2003 as “the early anthropogenic hypothesis.”

References and additional resources