The planetary boundaries framework – one of the most influential ideas of our age – is used to describe human–Earth relationships. It shapes global environmental policy and new economic thinking. This book takes a multidisciplinary approach to the planetary boundaries framework. It consists of 18 chapters by scholars from disciplines ranging from international law to Indigenous knowledge. Each section begins with an introduction by the editors before expanding into a critical analysis of the reach and limits of the planetary boundaries framework itself, with each of the nine boundaries the focus of two chapters. This volume comes at a critical moment, when the unprecedented challenges of the climate crisis demand new approaches, tools, and perspectives to questions of justice and sustainability. It is a valuable resource for researchers and students in environmental politics and ethics, geography, and Earth system science. This title is also available as Open Access on Cambridge Core.