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.