Empire and Communications is a book published in 1950 by University of Toronto professor Harold Innis. It is based on six lectures Innis delivered at Oxford University in 1948. The series, known as the Beit Lectures, was dedicated to exploring British imperial history. Innis, however, decided to undertake a sweeping historical survey of how communications media influence the rise and fall of empires. He traced the effects of media such as stone, clay, papyrus, parchment and paper from ancient to modern times.