So jgnat, do you think Jesus' teachings would have been preserved orally in the absence of scripture? I'll be honest, I think without the Bible the Jesus story might have been no more than a historical footnote. Could you honestly say you'd still be a Christian if you'd never encountered a Bible?
I don't think it was so much for the Bible that kept the Jesus story alive throughout the centuries but more of the history of the Christian church. If it had not been for Rome converting to Christianity and establishing the Roman Catholic church much of what we know and have today would not exist and the world would be much different.