Frederick Erskine Olmsted, also known as Fritz Olmsted, (November 8, 1872 – February 19, 1925) was an American forester and one of "the founders of American forestry". He is credited with helping to establish the National Forest system in the United States and developed the system of forest management that was applied nationally. He also was a consulting forester and taught at Harvard University. With Olmsted, "Forestry was not merely a career or a business profession; it filled his whole soul and he knew how to love forestry, fight for forestry, and suffer for forestry."