How did the introduction of writing alter the practice of religion? How does it affect our knowledge of history and of ancient religion?

The Introduction of writing was Mesopotamia which kept record already deemed authoritative. This book was the oldest and first writing. The materials were past from the elder generation to the younger generation. Mesopotamia caused big different from actual practicing. The people would incorporate into their own religion what was written in their own religion. They would emphasis the rules of the religion by writing it down in a paper to follow. The only problem was...