He’d spent years touting his vision that America would one day dominate one of the world’s most powerful markets. And when Harold Hamm, a pioneer in discovering vast reserves of shale oil under American soil, took the stage in front of several hundred oil luminaries, he never acknowledged that the narrative was in doubt. “For the next 50 years, we can expect to reap the benefits of the shale revolution,” Hamm said one day this spring. “It’s the biggest thing that ever happened to America.” But away from the stage, the U.S. oil industry — and Hamm — was in crisis. In the previous six months, Hamm, founder of oil giant Continental Resources, had lost $6.5 billion, more than one-third of his net worth. The industry that Hamm had helped create was facing its greatest test in a frantic race to stay profitable as rival Saudi Arabia […]