On June 18, Pope Francis issued a papal encyclical pointing to climate change as the overriding moral issue of our time. The encyclical boldly proclaims that humanity’s capacity to alter the climate charges us with the gravest moral responsibility we have ever had to bear. Climate change affects everyone. The disruptions to the biosphere occurring today bind all peoples everywhere into a single human family, our fates inseparably intertwined. No one can escape the impact, no matter how remotely they may live from the bustling centers of industry and commerce. The responsibility for preserving the planet falls on everyone.