From the semaphore and telegraph to contemporary information technologies, Dynamics of Modern Communication focuses on the relationship between technological and social change. Particular emphasis is put on four processes: the birth of the modern state at the end of the eighteenth century; the development of stock markets; the transformation of private life in the modern nuclear family; and the individualism of the late twentieth century.

Exploring the interaction of technology and social context - for example, in the move from public methods of communication to more private and individualized forms - Flichy exposes the gap between the original conception of a technology and its end use after the interplay of political, economic and consumer forces.