The much awaited publication of the Pope’s encyclical letter on climate change takes the issue of climate change and social justice further into the public’s consciousness. The Pope aims to influence governments and corporations in time before the 21st Conference of Parties (COP) to the United Nations Framework Convention on Climate Change (UNFCCC) commences negotiations for a global climate deal in Paris on December 2015. It sends a heightened call-to-action, not only for world leaders to adopt a legally binding agreement on greenhouse gas emissions reductions and other urgent climate measures by governments and corporations, but also to billions of people, in their organizations and communities, to stand for climate justice and transformative social change.