The massive oil spill in the Gulf of Mexico in 2010 was not caused by BP, but by a contractor, yet BP got the blame. The toxic waste from the production of Apple products dumped in China in 2011 was not dumped by Apple, but by a supplier, yet Apple got the blame. The horsemeat found in beef burgers in 2013 was not added by Tesco, but by a supplier, yet Tesco got the blame. In all three cases, blame for the damage caused by suppliers floated up through the supply chain until it lodged with the big brand at the top. No longer can companies constrain their corporate responsibility within the factory fence, as that boundary is not recognised by outside observers. This situation is exacerbated by the fact that the majority of most organisations" environmental footprint lies in their supply chain. This means that, to address the sustainability agenda in a meaningful way, they must tackle the impacts of their suppliers. Unfortunately this is a huge challenge as visibility and influence...