We are living in a climate of risk. Our way of life imposes risks on ourselves and others. We are causing climatic changes that have the potential to change radically the conditions under which both we – the present generation – and future generations will live. While we are now quite certain that climate change is happening, we are unsure of exactly what will happen and when, given different emissions and policy scenarios. We are therefore in a position where we must decide what to do about the risks climate change threatens in the face of a range of uncertainties In this book, Lauren Hartzell-Nichols provides guidance in the face of this uncertainty by offering an in-depth discussion of how and why we ought to take a precautionary approach to climate policy, namely by appeal to a Catastrophic Precautionary Principle and Catastrophic Precautionary Decision-Making Framework. By examining the way in which climate change is harmful, Hartzell-Nichols shows how precaution does have a meaningful role to play in moving climate policy forward if we reconsider what precaution is about before too quickly appealing to precaution as a reason or justification for action. A Climate of Risk takes a philosophically grounded, interdisciplinary approach that will appeal to a broad scholarly and policy-oriented audience. Hartzell-Nichols’s reinterpretation of the precautionary principle enables precaution to be more effectively leveraged as a driver of action on climate change.