St. Jerome was born around 320 and died in 420 -- not exactly what I would consider the first several hundred years. I'm talking the first 200 years or so of church history, of which there is ample evidence for my position and scant evidence for yours.
Jerome was also dead set against including the "deuterocanonical" books in the Bible. Was he correct about this, too?
Very little for either one, if the truth be told. People being actively persecuted usually don't have much time for theological debates.
Jerome was also dead set against including the "deuterocanonical" books in the Bible.
Not "dead set" at all. When it became clear he was on one side and Rome was on the other, he obeyed the Pope like the good son of the Church he was.