It's scary to think what this land would look like if the park didn't exist. Most likely, it would not be one of the most diverse ecosystems in North America. It would not be rich with thousands of species of plants and animals, many of which cannot be found anywhere else in the world. The area would not be part of an International Biosphere Reserve.
Certainly, GSMNP would not be home to roughly 187,000 acres of old growth forest, the largest such stand east of the Mississippi River. It would not contain the densest black bear population in the Eastern United States or the most diverse salamander population outside of the tropics.
We can presume these things because by the 1930s, about two-thirds of the virgin forests in the Smokies had already been removed. Water and minerals were also being exploited.
What saved this area, though, and made this a protected national park, was a movement that began in the 1920s by residents of Knoxville, Asheville, and other surrounding communities.