EL-336; Radio and the Rediscovery of Rhetoric. Ch. 4
"Franklin Roosevelt and Adolph Hitler embodied power and persuasion over men's minds which was electronically transmitted and which proved functionally essential to the kind of political influence that they wielded." (Havelock. The Muse Learns to Write)
I loved this chapter so much, that I read it twice. It actually defended the argument that I have been trying to defend. Speech relying on writing. One needs the other. The two were forced into some bizarre union. The result was successful. Radio personalities need some sort of script to read off of when they broadcast. This is what reaches the masses, not some random thoughts a DJ can come up with out of his/her head.
Radio waves are able to be transmitted worldwide, reaching the necessary parties that they cater to. Oral communication was designed to reach specific audiences in times of war and other such events. This would either build character, or in the case of Hitler broadcasting to threatening countries, destroy. The power of the word is very strong, but to speak well and mean it, something must be written, so the speaker is able to get their point across clearly. Reading off of a script is a lot easier than trying to persuade an audience empty handed.