Addressing crucial contemporary dilemmas, from the current international economic malaise to the state of the global environment, this unique discussion--based on the 2009 Gulbenkian Conference in Lisbon--addresses climate change, biodiversity, environmental policy, and the ethics of consumption. This ambitious survey is written by leaders in a variety of fields and incorporates a number of disciplines and perspectives, assessing the current state of our planet and arguing for a just and solid international climate agreement. Exploring the issues from social, ethical, and scientific angles, this comprehensive and enlightening account will interest politicians, environmentalists, and economists.