In the two decades before the Hepburn Act’s enactment, two entities vied for the right to coordinate the price and distribution of coal. The first—a group known as the Joint Conference of Miners and Operators of the Central Competitive Field—was the child of the United Mine Workers.The second—a group of coal-hauling railroads known as the Seaboard Coal Association—was the child of J. P. Morgan and the Pennsylvania Railroad. Understanding their struggle for power (and why capitalists rather than workers won), can help us better understand the stakes of antitrust.