Pinchot was the first director of the U.S. Forest Service and later served as the governor of Pennsylvania. He was interested in conservation as compared to preservation, which John Muir favored. Although Pinchot and Muir were initially friends, philosophical differences led to a split in later years. A number of works have been written about Pinchot, including Char Miller’s Gifford Pinchot and the Making of Modern Environmentalism and his Seeking the Greatest Good: The Conservation Legacy of Gifford Pinchot. Pinchot was a consummate diarist, and those diaries appear in The Conservation Diaries of Gifford Pinchot, edited by Harold Steen.