That's where the idea of a "Buffalo Commons" comes in. Backers want to accumulate big swaths of the Plains, and repopulate the land with bison and other native species.
A group called the American Prairie Foundation is trying to do that in northeastern Montana, around the town of Malta. It's knitting together a hodgepodge of old family ranches and public land, with the hope of eventually luring in ecotourists.
It's a pretty radical idea for a part of the country that's pretty, but decidedly NOT radical.
Here's a portrait from the Plains from producers Dan Collison and Elizabeth Meister.