Genesis, the rst book of the Bible, tells of the creation of the world and our dominion over it. But is this the whole story? The planet on which we live is ecologically fragile, and all people of good will have a respon- sibility to take care of this most precious gift. During his papacy, Pope Benedict XVI repeatedly drew attention to the environment, whether in terms of preserving it--such as his address concerning Amazonia and his letter regarding the Arctic--or distributing its vital resources--such as water--more equitably. What is more, during Benedict's papacy, the Vatican became the rst, and remains the only, carbon-neutral country in the world. This book gathers together the audiences, addresses, letters, and homilies of Benedict on a wide-ranging set of topics that deal with the world about us. The major themes and connections he explores are cre- ation and the natural world; the environment, science, and technology; and hunger, poverty, and the earth's resources. In these pages, Benedict insists that if we truly desire peace, we must be increasingly conscious of and nurture all of creation. Further- more, he argues convincingly that as our love of God should cause us to protect the environment, so should our heightened sense of appre- ciation of the natural world draw us closer to God. Benedict speaks out against the spread of nuclear weapons, threats to biodiversity, and in favor of alternative energy. He urges sustainable development, equita- ble distribution of food and water, and an end to hunger. This book is a valuable resource for all those who seek to under- stand more fully the relationships among the environment, Catholic social teaching, and theology. Whether speaking to a vast crowd, meet- ing with a small group of scientists, or writing letters to world leaders, Benedict has shown a clear path towards a theologically cogent con- cern for the planet on which we live.