In How the New World Became Old: The Deep Time Revolution in America (Princeton UP, 2024), Caroline Winterer, William Robertson Coe Professor of History and American Studies at Stanford University, takes her reader on a journey through the historical strata of the United States’ relationship with deep time. From the early days of the republic to the first half of the twentieth century, Winterer retraces how the study of the continent’s geological past provided Americans with “a vocabulary with which to frame their nation’s place in the cosmic order.” If the bones of dinosaurs found in the West play an expected part in this history, the book highlights the forgotten roles of less conspicuous, yet just as fascinating, fossils, such as the remains of Silurian trilobites and Carboniferous ferns. 

The book shows how fossil finds throughout history helped re-imagine, many times over, the past, present, and future of the United States. Far from simply ennobling the “New World” with an antiquity that could compete with the depth of Europe’s past, the study of American fossils influenced how Americans thought about the origins, landscapes, resources, and the many peoples of the continent. Indeed, if the author makes room for the intriguing developments of paleontological discoveries and the riveting story of how “Americans crafted a virtual deep time” made of paintings, magic lanterns, and other models, she also addresses the violence, both toward ecosystems and people, often justified by deep time imaginaries. Through its historical investigation, How the New World Became Old reminds the reader that today’s responses to intertwined ecological and social challenges will inevitably be informed by our conceptions of deep time.

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