Giorgos Kallis is an ecological economist, political ecologist, and Catalan Institution for Research and Advanced Studies (ICREA) Professor at the Institute of Environmental Science and Technology, Barcelona. He is the coordinator of the European Network of Political Ecology, the editor of Degrowth: A Vocabulary for a New Era, and the author of Limits and The Case for Degrowth. His research is motivated by a quest to cross conceptual divides between the social and the natural domains, with particular focus on the political-economic roots of environmental degradation and its uneven distribution along lines of power, income, and class. His current work explores the hypothesis of sustainable degrowth as a solution to the dual economic and ecological crisis. He was previously a Marie Curie Fellow at the Energy and Resources group at UC Berkeley, and he holds a PhD in Environmental Policy from the University of the Aegean, an MSc in Economics from Universitat Pompeu Fabra, and an MSc in Environmental Engineering and a Bachelors in Chemistry from Imperial College, London.