This introduction to the special issue describes the impetus for a review of the merger of mass and interpersonal communication processes in light of recent developments in communication technologies. It reviews historical arguments about the need for integration in theorizing about communication processes. Then, it discusses the potential for communication technologies to combine mass and interpersonal communication in ways that obviate the traditional distinction between both types, and how interactive communication technology offers unprecedented analytic approaches for research. Finally, it previews the 11 essays that follow by identifying 4 types of convergence of mass and interpersonal communication: concurrence, integration, transformation, and evolution.