Cities are increasingly central to the global governance of climate change, and much of their activity takes place within city-networks operating at national, regional, and global scales. As the scope and ambition of city activities have been augmented over the past decade, so the scholarship has evolved as well. I set out in this review article to trace this evolution by focusing on four lines of inquiry organized around the conceptual foundations of governance experimentation, horizontal coordination, vertical integration, and political contestation. As we stand at the cusp of a vital moment in the global response, I suggest the need for a concerted effort to direct more, and more sustained, attention to the last of these. I argue that careful, critical, and creative thinking with respect to the power relations shaping the role of cities as global climate governors offers a means through which scholars can best contribute to augmenting the capacity for a just and effective urban contribution to the global effort.