John Muir (April 21, 1838 – December 24, 1914) was one of the first modern preservationists. His letters, essays, and books telling of his adventures in nature, and wildlife, especially in the Sierra Nevada mountains of California, were read by millions and are still popular today. His direct activism helped to save the Yosemite Valley and other wilderness areas. The Sierra Club, which he founded, is now one of the most important conservation organizations in the United States. His writings and philosophy strongly influenced the formation of the modern environmental movement.
John Muir was born in Dunbar, East Lothian, Scotland to Daniel Muir and Ann Gilrye. He was one of eight children: Margaret, Sarah, David, Daniel, Ann and Mary (twins), and the American-born Joanna. In his autobiography, he described his boyhood pursuits, fighting (either by re-enacting romantic battles of Scottish history or just scrapping on the playground) and hunting for birds nests (ostensibly to one-up his fellows as they compared notes on who knew where the most were located). Such pursuits would later prove formative to Muir's adult character.