In this short, accessible guide to the most important legal quest of our lifetime, world-renown international lawyer Philippe Sands explores the historic creation of the law of ecocide and it's potential to combat climate catastrophe. Through a compelling blend of legal analysis and environmental advocacy, Sands argues for the recognition of ecocide as an international crime, akin to genocide and war crimes. By holding corporations and governments accountable for their destructive actions, this pioneering legal framework could halt environmental degradation and foster a global commitment to sustainable practices. With characteristic clarity, insight and engaging storytelling, Sands illustrates how the law of ecocide might be our last hope to avert an impending climate disaster and secure a liveable future for generations to come.