The Columbian Exchange

The Columbian Exchange

Author: BBC Radio 4 March 26, 2026 Duration: 52:40

Misha Glenny and guests discuss the exchange of cultures and biology across the Atlantic and Pacific after 1492. That was when Columbus reached the Bahamas, a time when Europe had no potatoes, tomatoes, sunflowers or, arguably, syphilis in its most virulent form; the Americas had no cattle, bananas, sugar cane or smallpox. The lists of what was then exchanged are long and as these flora, fauna and diseases moved between continents, their impact ranged from transformation to devastation. In parts of the Americas, European viruses helped kill over 90 percent of the population. In parts of Europe, Africa and Asia populations boomed on the new American foods. Sheep from Europe grazed fertile land into deserts in some parts of the Americas, while the lowered populations in others led to local reforestation which, arguably, is linked to a particularly cold period in the Little Ice Age.

With

Rebecca Earle Professor of History at the University of Warwick

John Lindo Associate Professor of Anthropology at Emory University

And

Mark Maslin Professor of Earth System Science at University College London

Producer: Simon Tillotson

Reading list

Steven R. Brechin and Seungyun Lee (ed.), Routledge Handbook of Climate Change and Society (Routledge, 2024), especially the chapter ‘Human Impacts on the Climate Prior to the Industrial Revolution’ by Alexander Koch, Simon Lewis, Chris Brierley and Mark Maslin

Judith Carney and Richard Rosomoff, In the Shadow of Slavery: Africa’s Botanical Legacy in the Atlantic World (University of California Press, 2009)

EJ Collen, AS Johar, JC Teixeira and B. Llamas, ‘The Immunogenetic Impact of European Colonization in the Americas’ (Front Genet, August 2022)

Alfred W. Crosby, The Columbian Exchange: Biological and Cultural Consequences of 1492 (Greenwood Press, 1972)

Rebecca Earle, ‘‘‘If You Eat Their Food . . .”: Diets and Bodies in Early Colonial Spanish America’ (American Historical Review 115:3, 2010)

Raymond Grew (ed.), Food in Global History (Routledge, 1999), especially ‘The Impact of New World Food Crops on the Diet and Economy of China and India, 1600-1900’ by Sucheta Mazumda

Simon L. Lewis and Mark A. Maslin, The Human Planet: How We Created the Anthropocene (Pelican, 2018)

Nathan Nunn and Nancy Qian, ‘The Columbian Exchange: A History of Disease, Food, and Ideas’ (Journal of Economic Perspectives 24:2, 2010)

Jeffrey Pilcher (ed.), The Oxford Handbook of Food History (Oxford University Press, 2012), especially ‘The Columbian Exchange’ by Rebecca Earle

In Our Time is a BBC Studios production

Spanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Misha Glenny and expert guests explore the characters, events and discoveries that have shaped our world.


For anyone with a restless mind, the weekly In Our Time podcast from BBC Radio 4 offers a deep and engaging conversation across the vast terrain of human thought and experience. Host Misha Glenny guides a panel of distinguished academics, not in lecture format, but through a lively, accessible discussion where ideas genuinely collide and unfold. You might find yourself immersed in the complex legacy of a figure like Napoleon one week, and the next be untangling the scientific principles of photosynthesis or the philosophical arguments of the Enlightenment. The scope is deliberately broad, covering history, religion, culture, science, and philosophy, because understanding one often requires context from another. What you hear is the genuine process of exploration-the questions, the debates, and the connections made in real time by leading experts. It’s the kind of podcast that doesn’t just recount the Sack of Rome or the intricacies of Russian court politics, but examines why these moments mattered and how their echoes are still felt. The result is a consistently stimulating hour that treats listeners as curious equals, offering the intellectual satisfaction of following a great conversation to its illuminating conclusion.
Author: Language: English Episodes: 50

In Our Time
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