Ten Basic Facts about the NT Canon That Every Christian Should Memorize: #6: "At the End of the Second Century, the Muratorian Fragment Lists 22 of Our 27 NT Books"
The Muratorian fragment is a key point in any discussion of New Testament canon. This article explains that the fragment illustrates that from a very early time period there was a core canon. The author discusses two implications to be drawn from this: Christians did disagree over books from time to time, and there was widespread agreement over the core very early on.