It is remarkable that any writing survives from the Late Bronze age.
Plato explained why Socrates did not write, and I mentioned it in a previous post.
Jesus was almost certainly illiterate, and could not write. The son of first century peasants from a one horse town, in a backwater province of the Roman Empire almost certainly never went to any school or received any academic education.
Moreover, Jesus was not an "influential" philosopher in his own lifetime. He was a Jewish apocalypticist with a ministry of a couple dozen people in the backwater, rural province of Galilee. He barely would have stood out against the other apocalyptic Jewish teachers of that time.
No one was clamouring for Jesus to write his biography and teachings, which he could not have done anyway due to his probable illiteracy.
The teachings of Jesus were circulated in written form decades after his execution, by highly educated Greek-speakers who recorded the events of Jesus' life based on the oral traditions about his him which were circulating in Palestine and Asia Minor. Paul is who made Jesus a household word by the fourth century.
