"This book presents evidence of an overall pattern generated by radical changes in media, arguing that the major social revolutions in the West have been preceded by innovations that drastically alter the relative importance of informational scale economies (the impact of production volume on unit cost) and network effects (the gain to each member of a network when a new agent joins). Dudley contends that an innovation that alters the balance between scale economies and network effects initially has a dramatic result, blasting apart existing interpersonal networks; however later, out of the debris, a new society emerges. With detailed case studies addressing the sources of innovation in information technology, along with a conceptual framework to explain their effects, this book will be of interest to students and teachers of Western economic and social history, as well as to the general reader with an interest in the social impact of innovation."--Jacket.