In his work on social complexity, Niklas Luhmann always gave to symbolic communication a central, indeed pivotal place. Yet he had never written a systematic theoretical statement about mass media and communication. Only now, posthumously, in these late lectures from the very end of his extremely productive life, do we have finally such a statement. It is written with all the conceptual elegance and the supple empirical intuition that we came always to expect from this great German master, whose presence in contemporary intellectual life is already sorely missed. Jeffrey C. Alexander, University of California, Los Angeles