You know, it occurs to me, that if humans had never developed writing, no holy books would exist?
There might be tales and stories handed down from generation to generation, but no neighbour kids trying to cram the Bible down my son's throat when he was growing up.
Of course science would also have a monumental wall to overcome, but imagine a written language where religious ideas had not been invented, sort of like 1984 except not for political reasons.

"Be ye not lost amongst Precept of Order." - Book of Uterus, 1:5, "Principia Discordia, or How I Found Goddess and What I Did to Her When I Found Her."