The National Parks: The Last Refuge (1890 to 1915)

At the end of the 19th century, some Americans begin to question the nation's headlong rush across the continent that has devastated forests and ravaged entire species of animals. Conservation's greatest champion is the new president, Theodore Roosevelt, who creates parks and wildlife refuges, and then audaciously uses the Antiquities Act to set aside 800,000 acres of the Grand Canyon as a national monument. John Muir fights the battle of his life to prevent the city of San Francisco from burying the Hetch Hetchy Valley in Yosemite National Park under a reservoir, and dies broken-hearted after he loses.