Players in the energy and environment sectors, whatever their position in the value chain, have a dual responsibility: to provide the system with the means to transform itself, and at the same time to reform themselves internally to limit their impact. This twofold challenge calls for far-reaching adjustments to strategies, organizations and investments in an increasingly unpredictable environment. Tomorrow’s leaders are those who know how to combine creativity and openness in the design of solutions, rationality in the illumination and choice of options, rigor in their deployment, adaptability and flexibility in their operationalization.