With costs continuing to fall and as technology innovation, together with market design innovation, overcome issues of intermittency, renewable energy is reaching a tipping point that is reinventing the global energy system. This has major economic, social and financial implications that will reorder global energy geopolitics. Major opportunities, as well as risks, lie ahead for countries and private sector actors, and their responses will not only determine our climate future, but also the economic and social future of millions and the geopolitical map of our world.