How the Columbian Exchange Reshaped the World

CrashCourse

In this installment of Crash Course World History, John Green explores the profound and lasting impact of the Columbian Exchange—the transfer of plants, animals, diseases, and people between the Old World and the New World following Columbus's voyages. The video moves beyond the traditional narrative of conquest to focus on the biological and ecological transformation of the planet, arguing that this exchange homogenized the world's biological landscape and fundamentally altered human history.