As a consummately effective ‘boundary term’, able to link disparate groups on the basis of a broad common agenda, ‘sustainability’ has moved a long way from its technical association with forest management in Germany in the eighteenth century. In the 1980s and 1990s it defined – for a particular historical moment – a key debate of global importance, bringing with it a coalition of actors – across governments, civic groups, academia and business – in perhaps an unparalleled fashion.