Report summary: The world in the 21^st century is characterized by both unprecedented risk and unprecedented foresight. Climate change, population shifts and cyber-threats are rapidly increasing the scale and complexity of risks to international security, while technological developments are increasing our capacity to foresee those risks. This world of high consequence risks, which can be better modeled and anticipated than in the past, underscores a clear responsibility for the international community: A “Responsibility to Prepare.” This responsibility, which builds on hard-won lessons of the Responsibility to Protect (R2P) framework for preventing and responding to mass atrocities, requires a reform of existing governance institutions to ensure that critical, nontraditional risks to international security, such as climate change, are anticipated, analyzed and addressed systematically, robustly and rapidly by intergovernmental security institutions and the security establishments of nations that participate in that system. For more, see the Responsibility to Prepare page, including the full report.