If Ellen MacArthur is the dame of the circular economy, Walter R. Stahel (born June 5, 1946) can be well awarded the title of father of this economic model. Stahel has been influential in developing the field of sustainability, by advocating “service-life extension of goods – reuse, repair, remanufacture, technological upgrading” philosophies as they apply to industrialised economies. If waste is one half of the circular model, with its closed loops and matter reincarnation, product life is the other half. Service-life extension of goods as a strategy of waste prevention, product-as-a-service and resource efficiency through the dematerialisation of the industrial economy are the pillars of his thought. Stahel devoted his life to developing those concepts, funding in ...