From 2010 to 2017 Craig was Higher Education Programme Manager at the Ellen MacArthur Foundation where he worked with university partners on the development of circular economy -oriented courses and professional development resources. Craig is an ecologist with a particular interest in food sovereignty issues and the development of regenerative agriculture and horticulture enterprise networks in urban and peri-urban settings. Craig is currently a consultant and lives in the Yorkshire Dales (UK). From 2010 to the end of 2018 Ken Webster was Head of Innovation for the Ellen MacArthur Foundation and helped synthesise contemporary understanding around the 'circular economy'. Ken is currently based in Wales and makes regular contributions to conferences and seminars around the world. His current interests include open vs closed circular economy approaches, regenerative agriculture and integrating the monetary and materials stocks and flows. He is currently Visiting Fellow at Cranfield University, Director for the International Society for the Circular Economy, Fellow of the Royal Society of Arts and member of the Club of Rome's 21st Century Transformational Economics Commission. This volume is the latest in a series of cooperative projects developed with Craig Johnson over several decades beginning in 1986 and including co-authoring Sense and Sustainability (2008).