Walter J. Ong (born November 30, 1912, in Kansas City, Missouri, USA) was an American Jesuit priest, cultural historian, and philosopher renowned for his work on the impact of writing and orality on human consciousness and society.
From the blurb: Profound changes in thought processes and in personality and social structures were brought about by the invention of writing and the transformation from one stage of consciousness to another: from primary oral cultures to literate ones. Walter Ong here surveys and interprets the extensive work done during the last few decades, by himself and others, on the differences between orality and literacy.