America's Best Idea: The Birth and Growth of the National Park System

Wallace Stegner famously called national parks "the best idea we ever had." The U.S. National Park System traces its origins to a radical 19th-century notion: that the federal government should preserve sublime landscapes for all people, for all time.

The Spark: Yellowstone, 1872

On March 1, 1872, President Ulysses S. Grant signed the Yellowstone National Park Protection Act, creating the world's first national park. Two million acres of geysers, canyons, and wildlife were withdrawn from settlement, occupation, or sale—"dedicated and set apart as a public park or pleasuring-ground for the benefit and enjoyment of the people."

Visionaries and Champions

• John Muir, the Scottish-American naturalist, galvanized public support for Yosemite and wilderness preservation.
• Theodore Roosevelt, the "Conservation President," used the 1906 Antiquities Act to proclaim 18 national monuments (including Grand Canyon) and established 5 national parks, 150 national forests, and 51 bird reserves.
• Stephen Mather, first National Park Service director (1916), built the agency's infrastructure, professionalized management, and promoted parks as national treasures.

From Preservation to Recreation—and Back

Early parks prioritized scenic grandeur. Later additions expanded the mission: historic sites (Mesa Verde), seashores (Cape Cod), recreation areas, and urban parks. Today, 424 units cover 85+ million acres, hosting 300+ million annual visits—balancing conservation, education, and recreation in an ever-evolving democratic experiment.