Rapidly disappearing bison in the late 1800s prompted progressive thinkers to call for the preservation of wild lands and wildlife in North America. Following a legendary hunt for the last wild bison in central Montana, Dr. William Hornady sought to immortalize the West's most iconic species. Activists like Theodore Roosevelt rose to the call, initiating a restoration plan that seemed almost incomprehensible in that era. Follow the journey from the first animals bred at the Bronx Zoo to today's National Bison Range. Glenn Plumb, retired National Park Service chief wildlife biologist, and Keith Aune, retired Wildlife Conservation Society director of bison programs, detail Roosevelt's conservation legacy and the landmark efforts of many others.