Laudato Si addresses humanity's responsibility towards the natural world in the context of contemporary environmental challenges. Beginning by referencing a canticle of Saint Francis of Assisi, Pope Francis addresses the environmental impact of consumerism and irresponsible production. The first chapter highlights recent science on aspects of the ecological crisis as evidence of what is happening to the planet. In the second chapter, Francis addresses the need for awareness of a universal communion with all of nature. Chapters three and four discuss modern society’s excessive anthropocentrism and the relationship between human activity and the environment. Francis then proposes an integral ecology which respects humanity's unique place in the natural order. Chapters five and six outline courses of action to escape the current spiral of self-destruction and invite humanity into conversation about society’s ecological impact. It is the second encyclical published by Pope Francis and the first written entirely by him, as Lumen Fidei built on work by Pope Benedict XVI.