January 18: The Scripture of Nature (1851-1890) shows the beauty of Yosemite Valley and the geyser wonderland of Yellowstone. It features John Muir becoming their eloquent defender.
January 25: The Last Refuge (1890-1915) Theodore Roosevelt uses the presidential powers of the Antiquities Act to add national monuments and the Grand Canyon, and declares the ultimate purpose of the National Parks: "For the Benefit and Enjoyment of the People."
February 1: The Empire of Grandeur (1915-1919) features the establishment of the National Park Service and the influence of its early leaders, Stephen Mather and Horace M. Albright, and wealthy industrialists who were persuaded to help champion the park system.
February 8: Going Home (1920-1933) focuses on Americans embracing the automobile, setting off an explosion in the number of park visits. Meanwhile, the Rockefellers quietly buy up land in the Teton Mountain Range.
February 15: Great Nature (1933-1945) emphasizes the societal impacts of the park concept, including new environmental and naturalistic perspectives, employment opportunities, and expansion of the park idea to additional U.S. locations.
February 22: The Morning of Creation (1946-1980) details the ecological damage caused by 62 million visitors each year, and the controversial decision to protect wolves in Alaska.