Gentle correction. Some manuscripts included in the Bible date back over several thousands of years, but those and all other manuscripts included in the Old and New Testaments were individual manuscripts not intended to be part of a 'book'. There is no firm agreement on when the collection of manuscripts included in what we call the Old Testament and the manuscripts in what we call the Apocrypha were canonized or 'closed'. Some argue that it was before the beginning of the Christian era, others argue centuries later.
Most historians agree that the collection of manuscripts that make up the New Testament were closed with no more to be included beginning with the Muratorian Canon in the 2nd Century and it finalized I believe by Athanasius in the mid 4th Century.
In both cases the manuscripts were laboriously hand copied by scribes to be taught and read in the synagogues and churches. Because pretty much all of the New Testament was written by Christianized Jews well versed in their own Jewish manuscripts, many references in the New Testament are not explained but just assumed that those hearing would fill in the blanks. (I'm pretty sure they had no idea they were writing what we call 'scripture' when they wrote those manuscripts.)
Which is why when I teach Bible and Bible history, I cannot stress enough that the New Testament cannot be fully understood and appreciated without a good grounding in Old Testament content. And it is always good to remember that much of the Old Testament content was written from oral tradition as there was no written language during the Hebrew people's earliest history.
There is a false claim that the first Bible canon was introduced by the Universal Church....i.e., the Roman Catholic church. And its a well known historical fact that the RCC fought against publishing the Holy Scriptures into a modern translation format because the church would no longer be in control of the actual content of the Bible. In other words only a few "supposedly enlightened individuals" should be able to read from the Holy Scriptures. This practice brought the world such noble Christian Traits as the Spanish Inquisitions and the Crusades.
Factual correction: There was a time when the early RCC passed judgment upon the canon, there are at least "2" historical facts that prove the RCC was not responsible for the content of an offical canon.
1. Both the Old and New Testament canons were recongized prior to the founding of the RCC with its position that only the Clergy should have access to the text of the Holy Bible.....this trait was distinct to the RCC, such as claiming that Peter was the first POPE...etc.
2. The various church concils (i.e., synods of Hippo in 393 A.D., and Carthage in 397 A.D.) were simply stating they agreed to what had already been accepted as the offical canon.
Clearly the early manuscripts existed long before any Universal Canon.......for instance the scriptures themselves (the offical canon) states clearly that even while some of the authors of the N.T. were still alive, these early letters/epistles were passed around the church to different congregations ..example (Col. 4:16). Paul informing those who was reading his letter should also know that another letter to the church at Laeodica was avalible. Also take note of (1 Thess. 5:27).......telling those who was reading this letter to "pass it among the bortherhood."
Its absurd to claim that these letters were not recognized as SCRIPTURE long before 393 or 397........such as Peter telling everyone that Paul's letters should be considered as SCRIPTURE. (2 Peter 3:15-16)
Reality: The offical canon came about using all the existing known letters/espistles..........that were in agreement with the entirety. In other words the scientific method used was much like compartive analysis. The manuscripts that were rejected were rejected for a reason, the writings and authorships could not be varified as originating from any Apostle of Christ....these works are called Gnostic or Apocryphal..........they cannot be confirmed when compared to the messages/text of the letters that were accepted into the canon. Some deny the deity of Jesus.........and claim He was simply another prophet.
Why did these Gnostic and Aprocryphal works exist? The same reason that continues to exist today...........Yellow Journalism sells books, false power and authority can be established if someone is gullible enough to believe and accept the yellow journalism as truth......its the same ole story that has existed since the beginning of time. Greed, Fame, Power, Authority........
Strange that someone would claim they created the offical canon..........but today of some the books they use were today not even included in the supposed canon they first created.
The RCC is in the same boat as the Mormons and the Muslims.......they calim to have special access to new revelations from God.