n his environmental encyclical, Laudato Si’, Pope Francis introduces the concept of integral ecology. While he didn’t coin the term, the pope goes to great lengths to explain “everything is closely interrelated, and today’s problems call for a vision capable of taking into account every aspect of the global crisis.” An integral ecology, he says, includes human, environmental, economic and social dimensions, “so as to hear both the cry of the earth and the cry of the poor.” In this issue we highlight Maryknoll’s response to the global environmental crisis, which along with the threat of nuclear weapons is widely regarded by scientists as one of the “twin existential...