The Welfare and Retirement Fund of the United Mine Workers of America (UMWA) is widely acknowledged as the most innovative effort at group health care in the United States in the twentieth century. Ivana Krajcinovic describes the establishment, operation, and demise of the Fund that brought mining families from the backwater to the forefront of medical care in less than a decade. Krajcinovic analyzes the success of the Fund over nearly three decades in providing high-quality cost-effective care to miners and their families. She also explains the irony of its dismantlement at the very moment when its innovations gained currency among mainstream commercial plans.