Fondly recalled for his steady leadership during the Great Depression and World War II, Franklin Roosevelt has not always gotten credit for his far-reaching efforts as a conservationist, suggests Douglas Brinkley in this history, a companion of sorts to his The Wilderness Warrior: Theodore Roosevelt and the Crusade for America. Brinkley traces FDR's love for the natural world to his youth exploring the Hudson River Valley, and relates how as president, Roosevelt protected the Great Smokies, Mammoth Cave, Joshua Tree, and the Everglades.