The divisions of the TaNaKh
The Torah
The history of the canonization of the Torah as a book must be distinguished from the process by which the heterogeneous components of the literature as such developed and were accepted as sacred.
The Book of the Chronicles, composed c. 400 bce, frequently refers to the “Torah of Moses” and exhibits a familiarity with all the five books of the Pentateuch. The earliest record of the reading of a “Torah book”; is provided by the narrative describing the reformation instituted by King Josiah of Judah in 622 bce following the fortuitous discovery of a “book of the Torah” during the renovation of the Temple. The reading of the book (probably Deuteronomy), followed by a national covenant ceremony, is generally interpreted as having constituted a formal act of canonization.
Between this date and 400 bce the only other ceremony of Torah reading is that described in Nehemiah as having taken place on the autumnal New Year festival. The “book of the Torah of Moses” is mentioned and the emphasis is on its instruction and exposition. The Samaritans, the descendants of Israelites intermarried with foreigners in the old northern kingdom that fell in 722 bce, became hostile to the Judaeans in the time of Ezra and Nehemiah (6th–5th centuries bce). They would not likely have accepted the Torah, which they did, along with the tradition of its Mosaic origin, if it had only recently been canonized under the authority of their arch-enemies. The final redaction and canonization of the Torah book, therefore, most likely took place during the Babylonian Exile (6th–5th centuries bce).
The Neviʾim
The model of the Pentateuch probably encouraged the assemblage and ordering of the literature of the prophets. The Exile of the Jews to Bablylonia in 587/586 and the restoration half a century later enhanced the prestige of the prophets as national figures and aroused interest in the written records of their teachings. The canonization of the Neviʾim could not have taken place before the Samaritan schism that occurred during the time of Ezra and Nehemiah, since nothing of the prophetical literature was known to the Samaritans. On the other hand, the prophetic canon must have been closed by the time the Greeks had displaced the Persians as the rulers of Palestine in the late 4th century bce. The exclusion of Daniel would otherwise be inexplicable, as would also the omission of Chronicles and Ezra–Nehemiah, even though they supplement and continue the narrative of the Former Prophets. Furthermore, the books of the Latter Prophets contain no hint of the downfall of the Persian Empire and the rise of the Greeks, even though the succession of great powers in the East plays a major role in their theological interpretation of history. Their language, too, is entirely free of Grecisms.
These phenomena accord with the traditions of Josephus and rabbinic sources limiting the activities of the literary prophets to the Persian era.
The Ketuvim
That the formation of the Ketuvim as a corpus was not completed until a very late date is evidenced by the absence of a fixed name, or indeed any real name, for the third division of Scripture. Ben Sira refers to “the other books of our fathers,” “the rest of the books”; Philo speaks simply of “other writings” and Josephus of “the remaining books.” A widespread practice of entitling the entire Scriptures “the Torah and the Prophets” indicates a considerable hiatus between the canonization of the Prophets and the Ketuvim. Greek words are to be found in the Song of Songs and in Daniel, which also refers to the disintegration of the Greek Empire. Ben Sira omits mention of Daniel and Esther. No fragments of Esther have turned up among the biblical scrolls (e.g., the Dead Sea Scrolls) from the Judaean Desert. Rabbinic sources betray some hesitation about Esther and a decided ambivalence about the book of Ben Sira. A third generation Babylonian amora (rabbinical interpretive scholar; pl. amoraim) actually cites it as “Ketuvim,” as opposed to Torah and Prophets, and in the mid-2nd century ce, the need to deny its canonicity and prohibit its reading was still felt. Differences of opinion also are recorded among the tannaim (rabbinical scholars of tradition who compiled the Mishna, or Oral Law) and amoraim (who created the Talmud, or Gemara) about the canonical status of Proverbs, Song of Songs, Ecclesiastes, and Esther.
All this indicates a prolonged state of fluidity in respect of the canonization of the Ketuvim. A synod at Jabneh (c. 100 ce) seems to have ruled on the matter, but it took a generation or two before their decisions came to be unanimously accepted and the Ketuvim regarded as being definitively closed. The destruction of the Jewish state in 70 ce, the breakdown of central authority, and the ever widening Diaspora (collectively, Jews dispersed to foreign lands) all contributed to the urgent necessity of providing a closed and authoritative corpus of sacred Scriptures.
The Samaritan canon
As has been mentioned, the Samaritans accepted the Pentateuch from the Jews. They know of no other section of the Bible, however, and did not expand their Pentateuchal canon even by the inclusion of any strictly Samaritan compositions.
The Alexandrian canon
The Old Testament as it has come down in Greek translation from the Jews of Alexandria via the Christian Church differs in many respects from the Hebrew Scriptures. The books of the second and third divisions have been redistributed and arranged according to categories of literature—history, poetry, wisdom, and prophecy. Esther and Daniel contain supplementary materials, and many noncanonical books, whether of Hebrew or Greek origin, have been interspersed with the canonical works. These extracanonical writings comprise I Esdras, the Wisdom of Solomon, Ecclesiasticus (Ben Sira), Additions to Esther, Judith, Tobit, Baruch, the Epistle of Jeremiah, and additions to Daniel, as listed in the manuscript known as Codex Vaticanus (c. 350 ce). The sequence of the books varies, however, in the manuscripts and in the patristic and synodic lists of the Eastern and Western churches, some of which include other books as well, such as I and II Maccabees.
It should be noted that the contents and form of the inferred original Alexandrian Jewish canon cannot be ascertained with certainty because all extant Greek Bibles are of Christian origin. The Jews of Alexandria may themselves have extended the canon they received from Palestine, or they may have inherited their traditions from Palestinian circles in which the additional books had already been regarded as canonical. It is equally possible that the additions to the Hebrew Scriptures in the Greek Bible are of Christian origin.
The canon at Qumrān.
In the collection of manuscripts from the Judaean Desert—discovered from the 1940s on—there are no lists of canonical works and no codices (manuscript volumes), only individual scrolls. For these reasons nothing can be known with certainty about the contents and sequence of the canon of the Qumrān sectarians. Since fragments of all the books of the Hebrew Bible (except Esther) have been found, it may be assumed that this reflects the minimum extent of its canon. The situation is complicated by the presence in Qumrān of extracanonical works—some already known from the Apocrypha (so-called hidden books not accepted as canonical by Judaism and the church) and pseudepigrapha (books falsely ascribed to biblical authors) or from the Cairo Geniza (synagogue storeroom), and others entirely new. Some or all of these additional works may have been considered canonical by the members of the sect. It is significant, however, that so far pesharim (interpretations) have been found only on books of the traditional Hebrew canon. Still, the great Psalms scroll departs from the received Hebrew text in both sequence and contents. If the Psalms scroll were a canonical Psalter and not a liturgy, then evidence would indeed be forthcoming for the existence of a rival canon at Qumrān.