This year is the 170th anniversary of one of the most significant events in world history: the discovery of gold at Sutter’s Mill in Coloma, California. On January 24, 1848, while inspecting a mill race for his employer John Sutter, James Marshall glimpsed something glimmering in the cold winter water. “Boys,” he announced, brandishing a nugget to his fellow workers, “I believe I have found a gold mine!”
Marshall had pulled the starting trigger on a global rush that set the world in motion. The impact was sudden – and dramatic. In 1848 California’s non-Indian population was around

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