This volume provides a comprehensive introduction to the spiritual, moral and practical themes of Pope Francis' encyclical Laudato Si'. Leading theologians, ethicists, scientists and economists provide accessible overviews of the encyclical's major teachings, the science it engages and the policies required to address the climate crisis. Chapters on the encyclical's theological and moral teachings situate them within the Christian tradition and papal teaching. Science and policy chapters, engaging the encyclical and provide introductions to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. The book provides a guide for those wishing to explore the issues raised by Laudato Si' but who lack the specialist knowledge required to know where to begin.Aimed at an undergraduate audience, this book provides a reliable introduction to the major themes of Laudato Si' such as: - a theology of Creation that embraces the insights of contemporary science- a renewed understanding of the human person in relationship to the rest of creation- a spiritual vision of love and responsibility for all creation- the necessary connection between Christian solidarity with the poor and concern for the environment- an introduction to the social encyclical tradition from which Laudato Si' both draws and develops