The sword and the pen worked together. Power was increased by concentration in a few hands, specialization of function was enforced, and scribes with leisure to keep and study records contributed to the advancement of knowledge and thought. The written record signed, sealed, and swiftly transmitted was essential to military power and the extension of government. Small communities were written into large states and states were consolidated into empire. The monarchies of Egypt and Persia, the Roman empire and the city states were essentially products of writing.

2007 edition, p. 30. - Empire and Communications (1950)