The proposed presentation will advance the thesis that “Commons Sourcing” is the emerging third wave of commercial transformation. It will begin with some background on the "Tragedy of the Commons" paradigm . It will then explain the iCommons concept and its origin in open source software (OSS) methodologies and emergence in other business models. It will then coin and define the term "Commons Sourcing" and situate it with respect to the two earlier waves of commercial transformation - in-sourcing and outsourcing. It will then conclude with some reflections by a Commons Sourcing lawyer.