This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book argues that it is essential to engage in pragmatic ways to address climate change drivers rather than dwelling on their psychologically debilitating effects. It reviews the latest available climate science and observations, as well as approaches to addressing the climate challenge. The book offers a scenario in which governments, following a series of catastrophic climate impacts, agree on an international binding target to implement rapid mitigation. It presents a historical analysis of wartime mobilisation, and, based on this review, develops a contingency scenario for mobilising resources for state-led rapid climate mitigation. The book presents how financial resources could be mobilised to meet the scale, speed and scope requirements of rapid climate mitigation following strategies provided by wartime finance. It presents governance strategies developed at wartime and examines possible similar and critical strategies for governing rapid mitigation.