Domestically, the effects of climate change could overwhelm disaster-response capabilities. Internationally, climate change may cause humanitarian disasters, contribute to political violence, and undermine weak governments. In this Council Special Report, Joshua W. Busby moves beyond diagnosis of the threat to recommendations for action. Recognizing that some climate change is inevitable, he proposes a portfolio of feasible and affordable policy options to reduce the vulnerability of the United States and other countries to the predictable effects of climate change.