Beleaguered by mutual recrimination between rich and poor countries, squeezed by the zero-sum arithmetic of a shrinking global carbon budget, and overtaken by shifts in economic and hence bargaining power between these countries, international cooperation on climate change has floundered. Given these three factors--which Arvind Subramanian and Aaditya Mattoo call the narrative, adding up, and new world problems--the wonder is not the current impasse; it is, rather, the belief that progress might be possible at all. In this book, the authors argue that any chance of progress must address each of these problems in a radically different way. First, the old narrative of recrimination must cede to a narrative based on recognition of common interests. Second, leaders must shift the focus away from emissions cuts to technology generation. Third, the old cash-for-cuts approach must be abandoned for one that requires contributions from all countries calibrated in magnitude and form to their current level of development and future prospects.