of self which includes the Earth. Joanna Macy describes a collective shift – referred to as the "Great Turning" – taking humanity into a new consciousness in which the earth is not experienced as separate. Sufi teacher Llewellyn Vaughan-Lee similarly grounds his spiritual ecology work in the context of a collective evolutionary expansion towards oneness, bringing us all toward an experience of earth and humanity – all life – as interdependent. In the vision and experience of oneness, the term "spiritual ecology" becomes, itself, redundant. What is earth-sustaining is spiritual; that which is spiritual honors a sacred earth. An important element in the work of these contemporary teachers is the call for humanity's full acceptance of responsibility for what we have done – physically and spiritually – to the earth. Only through accepting responsibility will healing and transformation occur. Including the need for a spiritual response to the environmental crisis, Charles, Prince of Wales in his 2010 book Harmony: A New Way of Looking at Our World, writes: "A specifically mechanistic science has only recently assumed a position of such authority in the world... (and) not only has it prevented us from considering the world philosophically any more, our predominantly mechanistic way of looking at the world has also excluded our spiritual relationship with Nature. Any such concerns get short shrift in the mainstream debate about what we do to the Earth." Prince Charles, who has promoted environmental awareness since the 1980s, continues: 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", 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". Scientist, environmentalist, and a leader in sustainable ecology David Suzuki also expresses the importance of including the sacred in addressing the ecological crisis: A Catholic nun interviewed by Sarah MacFarland Taylor, author of the 2009 book, Green Sisters: Spiritual Ecology, articulates