p. 11 Point about evolution and new technologies
People have had about 50,000 years' experience in the use of speech and gestures, 5,000 years' experience in writing, and about 100 years' use of the telephone. This cultural history should not be taken lightly; the entire fabric of our society has been shaped in significant part by cultural accommodations to our means of communicating.
As individuals of the species, living within a particular culture, we have a particular messaging history: from borth, we learn speaking roles and rules from conversations. By age 4 or 5, some basic telephone habits are learned (such as: "Say something when you pick up the receiver have it rings--don't just stand there sliently"). By age 7, we are writing non-trivial messages. The average adult has accumulated hundreds,--perhaps thousands--of rules of behaviour regarding telephone and written ethics and etiquette, from practical experiences with these tools since those early years.