By the end of the 19th century, widespread industrialization has left many Americans worried about whether the country will have any pristine land left. Congress has yet to establish clear judicial authority or appropriations for the protection of the parks. This sparks a conservation movement by organizations such as the Sierra Club, the Audubon Society, and the Boone and Crockett Club.
Examine the proliferation of protected lands and the protection of predatory animals.
Learn about the changes to the national parks during the Great Depression and WWII.
Encounter the growing numbers of visitors to the parks.
