We have to transform our energy system to avert the worst impacts of climate change. And if oil-and-gas companies want a place in that future, they must transform themselves—or else be consigned to history. Is it realistic to think fossil fuel companies could be part of the solution? Plenty of reasonable people say no, but I think constructive engagement with some in the industry can speed the transition. A few companies have taken meaningful steps in the right direction. To secure a place in the future, however, they need to think bigger and move faster.