Categories of New Testament manuscripts text (i.e. the four Gospels combined into a single narrative). Categories of New Testament manuscripts New Testament manuscripts in Greek are categorized into five groups, according to a scheme introduced in 1981 by Kurt and Barbara Aland in "The text of the New Testament". The categories are based on how each manuscript relates to the various text-types. Generally speaking, earlier Alexandrian manuscripts are category I, while later Byzantine manuscripts are category V. Aland's method involved considering 1000 passages where the Byzantine text differs from non-Byzantine text. The Alands did not select their 1000 readings from all of the NT books;
Development of the New Testament canon includes an explicit list of canonical books. Many Evangelical Christian groups (which have their origin in c. 1730 England) do not accept the theory that the Christian Bible was not known until various local and Ecumenical Councils, which they deem to be "Roman-dominated", made their official declarations. These groups believe that the New Testament supports that Paul (2 Timothy 4:11–13), Peter (2 Peter 3:15–16), and ultimately John (Revelation 22:18–19) finalized the canon of the New Testament. Some note that Peter, John, and Paul wrote 20 (or 21) of the 27-books of the NT and personally knew all the other NT