A consensus is emerging among climate scientists that the world needs to move to as quickly as possible to zero carbon emissions. The rate of ramp down to zero will depend, in large part, on the perceived urgency of the climate crisis. Steeper rates of decline will require more unconventional (and perhaps innovative) technologies and institutions and likely more state intervention in economies to mobilize human and financial capital. Rapid movement to zeroan emergency response, based perhaps on scientific evidence of an impending disintegration of polar ice sheets, would likely require social and economic mobilization on the scale of, and of the type seen in a major war. This workshop will bring together fifteen leading international experts and policymakers to study the social, economic, and policy implications of different emergency scenarios.