Climate change is genuinely global, dominantly intergenerational, and takes place in a setting where our prescriptive theories are weak. This “perfect moral storm” poses a profound challenge to humanity. This book explains the storm, how it makes sense of our current malaise, and why better ethics can help. This book argues that despite decades of awareness, we are currently accelerating hard into the climate problem in a way that defies standard explanations. It claims that this suggests that our current focus on the scientific and economic questions is too narrow, and that the tendency to see the political problem as a traditional tragedy of the commons facing nation states is too optimistic. Instead, the key issue is that the current generation, and especially the most affluent, are in a position to pass on most of the costs of their behavior (and especially the most serious harms) to the global poor, future generations and nonhuman nature. This tyranny of the contemporary is a deeper problem than the traditional tragedy of the commons. Moreover, the book argues that this diagnosis helps to explain both the past failures of international climate policy (e.g., the “shadow solutions” of Kyoto and Copenhagen), and the current push towards geoengineering. Part of the solution, it argues, is better public ethics. We must work harder on articulating both the ethical problem, and moral constraints on solutions. In addition, there is a role for “defensive” moral and political philosophy, aimed at preserving the quality of public discourse.