Was/is there an oral storytelling tradition? Are only certain stories allowed (and who chose these and why)? Are books easily available to all (or the technological equivalent)? Is reading encouraged? Are there libraries?
How does your world decide whether something it is civilised or not? You'll guess from the questions I list above I consider the ready availability of books, libraries, stories being generally available etc to be major considerations as to whether I think something is civilised!
How do the characters in your stories treat books and stories? Do their views agree with those held by their society or not?
The role of stories is important (they're a great way of getting a message across without preaching and are a wonderful form of entertainment. Does your fictional world treat them in the same way? If not, why not?).