John Muir

On April 21, 1838, in Dunbar, Scotland, John Muir was born into a strict religious family that immigrated to Wisconsin when he was a child. He studied at the University of Wisconsin, worked in factories, and turned toward natural observation after an eye injury redirected his life away from industrial routine. Long walking journeys and field notebooks became his real educational institutions.

Muir's essays on Yosemite, the Sierra Nevada, and wild landscapes made him the most famous nature writer of the late nineteenth century. In 1892 he helped found the Sierra Club, and in 1903 he famously camped with Theodore Roosevelt in Yosemite while arguing for stronger federal conservation. His writing and advocacy helped secure public support for national parks and a preservationist understanding of wilderness.

Muir's work influenced the expanding national park system and later environmental politics in the twentieth century. The Sierra Club, federal land policy, and public debates over preservation versus development all grew in a political world he had helped shape.