"They were Jewish, the most literate people on earth, so literate that even the son of a poor carpenter could and did read scripture at the temple." But Christ commanded the Gospel to be preached to the whole world:
Mk:16:15:
"And he said unto them, Go ye into all the world, and preach the gospel to every creature. (KJV)
even the son of a poor carpenter could and did read scripture at the temple."
And done without a teachers union...