Samuel Alexander is a lecturer with the Office for Environmental Programs and researcher at the Melbourne Sustainable Society Institute, University of Melbourne. His interdisciplinary work focusses primarily on the socio-economic implications of renewable energy transitions. He is author of twelve books, including Prosperous Descent: Crisis as Opportunity in an Age of Limits (2015) and Sufficiency Economy: Enough, for Everyone, Forever (2015). Joshua Floyd is Energy, Systems and Society Fellow at The Rescope Project. His work draws on experience in futures studies and strategic foresight, and systems thinking and practice. His technical grounding and interest in energy systems draws on a background in mechanical engineering and professional experience in the extractive metallurgy industry.