I sometimes hear this odd objection that the books that were to be included in the Bible were not decided until the 4th century. I think it comes from some Hollywood movie, or maybe a TV show. Anyway, this post should help fix that myth. I’m going to quote from New Testament expert Dr. Michael J. Kruger from his blog. He writes: One of the key data points in any discussion of canon is something called the Muratorian fragment (also known as the Muratorian canon). This fragment, named after its discoverer Ludovico Antonio Muratori, contains our earliest list of the books in the New Testament. While the fragment itself dates from the 7th or 8th century, the list it contains was originally written in Greek and dates back to the end of the second century (c.180). […]What is noteworthy for our purposes here is that the Muratorian fragment affirms 22 of the 27 books of the New Testament. These include the four Gospels, Acts, all 13 epistles of Paul, Jude, 1 John, 2 John (and possibly 3rd John), and Revelation. This means that at a remarkably early point (end of the second century), the central core of the New Testament canon was already established and in place. Although there is still dispute about some books, that does not negate the fact that the main books we use (the gospels, Acts, the letters of Paul) are all considered to be canon by 180 A.D., much before any famous church councils ever happened. And those books were decided on because they were in widespread use and respected by everyone.