John Muir (1838–1914) was a Scottish-American naturalist, author, environmental philosopher, glaciologist, and early advocate for the preservation of wilderness in the United States. His extensive writings on his adventures in nature, especially in the Sierra Nevada of California, have been read by millions and have inspired a continuing legacy of environmental activism. Notably, Muir's advocacy helped to preserve the Yosemite Valley, Sequoia National Park, and other wilderness areas. The 'Father of the National Parks,' Muir penned poignant essays and books that conveyed his deep love for the natural world and his despair over its destruction. 'The Yosemite' is among his most celebrated works, offering a compelling illustration of Muir's literary style, vividly recounting his experiences in the Sierra Nevada and advocating for the protection of such magnificent landscapes. His other significant works include 'My First Summer in the Sierra' and 'Travels in Alaska,' which further underscore his profound connection with nature and his instrumental role in creating the modern conservation movement. Muir was also a co-founder of the Sierra Club, an organization that continues to advocate for environmental preservation. Muir's narratives combined keen observations with a poetic appreciation for nature, influencing a generation of writers and conservationists and leaving an indelible mark on American literature and environmental policy.