The story of the United Mine Workers of America is the story of the American labor movement as a whole. The Mine Workers were once the single most important union in the United States: the union that broke from a stodgy labor federation in 1935 to devote its resources to organizing the nation’s factories, the union that built such dynamos as the United Auto Workers and the Steelworkers; the union that sunk so much money into Franklin Roosevelt’s 1936 campaign that FDR didn’t raise a peep when striking auto workers occupied General Motors’ Flint, Michigan, factories and didn’t come out until GM had recognized their union; the union that had the strength and cojones to strike during World War II’s strike ban; the union that transformed industrial America. Today, with membership shrunk to perhaps just 10 percent of their peak strength numbers, the Mine Workers, like the labor movement generally, have a past that quite outshines their present. Their retirees outnumber their current members, and they would outnumber them by an even larger margin if coal mining, with its black lung and emphysema, didn’t shorten so many miners’ lives. Clustered in Appalachia, the union, like its industry, sometimes seems to inhabit a land that time forgot.