Well, cultures that heavily relied on oral traditions developed systems that prevented a telephone type scenario from happening. Aboriginals combine oral traditions with ceremony, song, dance, and different medias of physical art. They also had respected leaders whose whole position was telling the right stories during specific times, at specific places, and to specific people in the tribe.

Aboriginal cultures have very advanced psychological technology which they use for the preservation of knowledge and the organisation of society. To white people, technology just means machines. But under a more holistic view, technology can be an idea that you use as a tool to do work. And Aboriginal cultures have very advanced mental tools. These tools have preserved knowledge for much longer than any book or clay tablet ever has, thanks to the expertise in psychology which was used to invent them.

Karl Marx referred to the economic organisation of cultures in Turtle Island and Australia as "primitive communism." But there's nothing primitive about it. Ask Me about Aboriginal farming.