In May 2015 Pope Francis’s Encyclical, “Laudato Si’: On Care for our Common Home,” endorsed the need for a spiritual and moral response to our environmental crisis, and thus implicitly brings the subject of spiritual ecology to the forefront of our present ecological debate. This encyclical recognizes that “The ecological crisis is essentially a spiritual problem,” [20] in line with the ideas of this developing field. American environmentalist, author, and journalist Bill McKibben who has written extensively on the impact of global warming, says that Pope Francis has "brought the full weight of the spiritual order to bear on the global threat posed by climate change, and in so doing joined its power with the scientific order."[21]