When a Carpenter in California Found a Nugget of Gold, It Started a Rush Toward the Nothing Less Than the Modern World

A new book by historian Nathaniel Philbrick makes the case that the James Marshall’s 1848 discovery set in motion events from the Civil War to the rise of Silicon Valley

Lydia Kiesling

September/October 2026

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On January 24, 1848, a carpenter named James Marshall found a nugget of gold while building a mill in the foothills of the Sierra Nevada. This moment started the gold rush that would bring thousands to the territory known as California. In The Rush: California Gold, the Civil War and the Making of the Modern World, the latest book by prolific historian Nathaniel Philbrick, Marshall’s discovery is a decisive historical moment, sending a fledgling nation “hurtling toward a reckoning not only with slavery but with its geographic immensity.” (The Smithsonian holds a nugget, above, thought to have been discovered by Marshall.)

The Rush is built on an enormous body of existing scholarship, and Philbrick synthesizes this research into a lively and accessible narrative. California was a highly disputed land when Marshall made his fateful find, poised to tip the balance between the Union’s 15 enslaving and 15 free states. Philbrick neatly evokes the politics, people and technologies that animated the period. He refers to the era’s collective technological and cultural accelerations as “the Rush” and invokes this force as the catalyst for events as disparate as the Civil War and the advent of moving pictures. 

“Life in California,” Philbrick argues, “could be cruel and unforgiving, but it was also filled with excitement, promise and—if you were a white American—immense freedom.” As Philbrick introduces us to the future barons who planned the Central Pacific line, he also reports on the lives of the Chinese workers who built the railway under intolerable conditions. Alongside politicians who maneuvered the Union into civil war, we meet outsiders who managed to drive events, including Mary Ellen Pleasant, a Black entrepreneur who built a laundry empire in San Francisco and funded abolitionist causes. Reportedly, she even posed as a jockey to travel to Virginia plantations to spread word of John Brown’s planned raid on Harpers Ferry.

As Philbrick describes the era’s personalities, vast wealth, racist violence and deep contradictions, he underlines their echoes in our own time. Californians in the 19th century, he writes, “wrestled with a question that Americans are still asking today: Just who are we?” The book’s final chapter, “Palo Alto,” links the events of the rush to the technology boom of Silicon Valley and offers a partial and foreboding answer to the question. “Like it or not,” Philbrick observes, “we are all passengers on a hurtling train.”  

Lydia Kiesling  is a novelist and culture writer whose work has appeared in New York Times Magazine, New Yorker and the Cut.