“In the industrial mode of development, the main source of productivity lies in the introduction of new energy sources, and in the ability to decentralize the use of energy throughout the production of circulation processes. In the new informational mode of development the source of productivity lies in the technology of knowledge generation, information processing and symbolic … what is specific to the informational mode of development is the action of knowledge upon knowledge itself as the main source of productivity... in a virtuous circle of interaction”