Book excerpt: We live in a world where material products have increasingly become vehicles for intangible symbolic and aesthetic messages. A very sizeable marketing and advertising industry produces only images and symbols---the immaterial dimension that `sells' material commodities. The economic boom that accelerated in the 1990s and crashed so spectacularly in 2008 was based largely on immaterial consumption, as capitalism tried to overcome the crisis of the Fordist regime by throwing itself into the new, so-called knowledge economy. --