The mixture of the oral and the written traditions in the writings of Plato enabled him to dominate the history of the West.

The significance of a basic medium to its civilization is difficult to appraise since the means of appraisal are influenced by the media, and indeed the fact of appraisal appears to be peculiar to certain types of media. A change in the type of medium implies a change in the type of appraisal and hence makes it difficult for one civilization to understand another.

We must appraise civilization in relation to its territory and in relation to its duration. The character of the medium of communication tends to create a bias in civilization favourable to an over-emphasis on the time concept or on the space concept and only at rare intervals are the biases offset by the influence of another medium and stability achieved.

It is suggested that all written works, including this one, have dangerous implications to the vitality of an oral tradition and to the health of a civilization, particularly if they thwart the interest of a people in culture, and following Aristotle, the cathartic effects of culture. "It is written but I say unto you" is a powerful directive to Western civilization.

Graham Wallas has reminded us that writing as compared with speaking involves an impression at the second remove and reading an impression at the third remove. The voice of a second-rate person is more impressive than the published opinion of superior ability.

The discovery of printing in the middle of the fifteenth century implied the beginning of a return to a type of civilization dominated by the eye rather than the ear.

The effect of the discovery of printing was evident in the savage religious wars of the sixteenth and seventeenth centuries. Application of power to communication industries hastened the consolidation of vernaculars, the rise of nationalism, revolution, and new outbreaks of savagery in the twentieth century.