The Rush

Nathaniel Philbrick argues that the 1848 discovery of gold in California set off a chain of events that propelled the United States toward the Civil War and forged the frenetic, technology-driven world of today. The book traces this argument across two decades, from the first gold flakes found at a remote sawmill to the completion of the transcontinental railroad in 1869.

The narrative opens with the origin of the name "California," drawn from a 1510 Spanish novel about a fictional island of gold. More than three centuries later, on January 24, 1848, a carpenter named James Marshall discovered gold in the tailrace, or water drainage channel, of a sawmill he was building for the Swiss adventurer John Sutter on the South Fork of the American River. The discovery coincided with the end of the Mexican-American War, which ceded more than half of Mexico's territory to the United States. When President James Polk confirmed the find in December 1848, gold fever swept the nation and the world. Thousands raced to California, but the country lacked the transportation infrastructure to move its citizens quickly to the Pacific coast. Philbrick identifies this urgent impatience as a defining characteristic of modern American life.

The book's first major thread follows the Chilean adventurer Vicente Pérez Rosales, who sailed from Valparaíso in late 1848 with his three brothers. Rosales's vivid chronicle captures the multicultural chaos of early Gold Rush San Francisco, a boomtown where fortunes were made and lost overnight and the normal social order was completely upended. In the goldfields, the brothers witnessed the violent expulsion of Native Americans from the mines. At Coloma, a mob of Oregonians massacred seven prisoners from the Nisenan, an Indigenous California people, after a mock trial. This violence initiated a broader campaign to drive Native peoples and foreign miners from the diggings. Rosales and his brothers were themselves targeted as anti-Chilean sentiment intensified. After a gang called the Hounds attacked San Francisco's Chilean community in July 1849, the brothers eventually lost everything and returned home.

At the center of the book stands the rivalry between California's first two U.S. senators: William Gwin and David Broderick. Gwin, a 44-year-old Mississippi plantation owner, arrived in California openly declaring he had come to obtain political power. At the 1849 constitutional convention in Monterey, he maneuvered skillfully, supporting a ban on slavery he privately intended to render meaningless. California entered the Union as a free state under the Compromise of 1850, and Gwin won the longer Senate term. He filled California's federal offices with Southern loyalists, pushed through the California Land Act of 1851 to strip Mexican-era landowners of their property, and championed a transcontinental railroad routed through the slaveholding South. His long-term strategy was to make free-state California function as a satellite of the South.

Broderick, the son of an Irish stonecutter from New York, represented the opposite end of the political spectrum. A self-educated political operator, he built his power base through San Francisco's Democratic machine and opposed the Chivalry, the proslavery Southern faction of California Democrats, at every turn. He protected political allies from Southern intimidation, once throwing himself in front of a drawn revolver to save state assemblyman Stephen Field, who would later serve on the U.S. Supreme Court. After years of struggle, Broderick won a Senate seat in 1857 and forced Gwin to surrender control of federal patronage. But President James Buchanan, allied with Gwin, refused to honor Broderick's appointments. In Washington, Broderick joined Illinois Senator Stephen Douglas in opposing the Lecompton Constitution, a proslavery document designed to admit Kansas as a slave state. In a powerful speech, he pointed to the stonework his father had carved in the Senate chamber as a tribute to working-class dignity. His defiance cost him his life: In September 1859, former California Supreme Court Justice David Terry challenged Broderick to a duel using hair-trigger pistols Terry had practiced with all summer. Terry shot Broderick through the lung, and Broderick died three days later.

Philbrick weaves several additional narratives through the book. James Williams, who had escaped slavery in Maryland, fled to California after the passage of the Fugitive Slave Act of 1850, only to find that proslavery forces had effectively nullified the state constitution's ban on involuntary servitude. The California Supreme Court ruled that an enslaved teenager named Archy Lee must be returned to his enslaver despite acknowledging the law should free him, prompting hundreds of Black San Franciscans to emigrate to British Columbia. Mary Ellen Pleasant, a wealthy Black businesswoman, organized the effort to free Lee and then traveled east to meet the abolitionist John Brown. Posing as a jockey, Pleasant infiltrated Virginia plantations along the Roanoke River to alert enslaved people of an impending uprising. When Brown launched his raid on the federal armory at Harpers Ferry prematurely, the plan collapsed, but Pleasant escaped and returned to California.

The book also chronicles California's war against its Native peoples. Governor Peter Burnett openly declared a campaign of extermination, and the legislature passed the Act for the Government and Protection of Indians, creating a system of quasi-legal Native enslavement. Eighteen treaties negotiated by federal commissioners, setting aside seven percent of California for Native peoples, were rejected by the U.S. Senate at Gwin's urging and sealed in a confidential file for 53 years. A militia unit called the Mariposa Battalion led the first known white expedition into Yosemite Valley in 1851, but the soldiers' purpose was military, not aesthetic: They burned the Ahwahnechee people's shelters and food stores.

The San Francisco Vigilance Committee of 1856 forms another major episode. Commission merchant William Tell Coleman organized a citizen army of 5,000 that seized the county jail, hanged accused shooter James Casey and gambler Charles Cora, and targeted Broderick's political allies. Philbrick presents the uprising less as civic reform than as a corporate-backed land grab and a dress rehearsal for secession.

As the Civil War approached, the discovery of the Comstock Lode, a massive deposit of gold and silver on the eastern slope of the Sierras, raised the stakes of California's allegiance. Unitarian minister Thomas Starr King, a diminutive Boston transplant, toured the state's mining towns preaching the Union cause to hostile, gun-carrying audiences. His relentless campaigning helped secure California for the Union and raised $1.2 million for the U.S. Sanitary Commission. California's gold and silver shipments financed the war bonds that sustained the Union's military effort. King died of diphtheria and pneumonia in 1864 at age 34.

The final section follows the construction of the transcontinental railroad. Engineer Theodore Judah surveyed a route through Donner Pass and recruited four Sacramento shopkeepers, Collis Huntington, Mark Hopkins, Leland Stanford, and Charles Crocker, to finance the Central Pacific Railroad. Judah died of yellow fever in 1863 before construction began, and the Associates, as the four men called themselves, pushed forward despite near-bankruptcy and ethical shortcuts that included falsifying the location of the Sierra foothills to inflate federal subsidies. Roughly 20,000 Chinese laborers, many lured from China's Pearl River Delta by the promise of Gold Mountain, their term for California, built the railroad through some of the most dangerous terrain on earth. Workers dangled from baskets on sheer cliffs at Cape Horn, where an estimated 300 died; tunneled through granite with nitroglycerin; and endured three winters of record snowfall that buried work sites under 40-foot drifts. At the completion ceremony at Promontory Point, Utah, on May 10, 1869, Stanford missed the ceremonial golden spike, but the telegraph operator sent the signal anyway. In the official photograph, two figures who may be Chinese appear with their faces hidden.

Philbrick concludes by tracing the Rush's legacy to the present. Stanford transformed his Palo Alto estate into a university after his son's death, and the region eventually spawned Silicon Valley. The pattern first set in motion by gold and technology, Philbrick argues, continues in the headlong advance of artificial intelligence, racing forward with minimal oversight.