How Many Authors Wrote the Bible?
The Bible was composed by at least 40 to 50 identifiable authors over roughly 800 years, from 8th-century BCE prophets to 2nd-century CE Christian communities. Once you count the anonymous editors, scribes, and redactors who shaped most of the books, the true figure runs higher. No single person wrote the Bible.
The number depends on what you mean by "author." The traditional count of about 40 comes from mapping one named individual onto each book — Moses for the Torah, David for the Psalms, Solomon for Proverbs, Paul for his letters. Modern scholarship revises that count in both directions at once: some named authors probably did not write the works assigned to them, while many single books turn out to contain the work of several hands.
Here is the broad shape of what scholars have found, part by part.
| Part of the Bible | Traditional author | What scholars find | Approx. composition |
|---|---|---|---|
| Torah (Genesis–Deuteronomy) | Moses | Four or more sources (J, E, D, P) plus editors | ~950–400 BCE |
| Deuteronomistic History (Joshua–Kings) | Various | Anonymous editors working in at least two editions | ~620–550 BCE |
| Prophetic books (Isaiah, Amos, etc.) | Named prophets | A prophet's oracles plus generations of later editors | ~750–450 BCE |
| Writings (Psalms, Proverbs, Daniel) | David, Solomon | Anthologies compiled from many contributors | ~1000–165 BCE |
| Pauline letters | Paul | Seven undisputed, six disputed or pseudepigraphic | ~50–120 CE |
| Gospels and Acts | Matthew, Mark, Luke, John | Technically anonymous; names added by later tradition | ~65–100 CE |
| Hebrews and general letters | Paul, apostles | Anonymous or disputed authorship | ~60–120 CE |
Pseudepigraphy — a work composed in the name of a revered figure after their death — does not shrink the total. It redistributes it. When most scholars conclude that the Pastoral Epistles were not written by Paul, three books leave Paul's column and three anonymous authors enter the count. Composite books like the Torah and Isaiah push the number upward, since each turns out to hold several distinct voices under a single title.
The seven undisputed letters of Paul are the clearest single-author attributions in the entire library. Almost everything else carries some degree of scholarly uncertainty about who composed it, when, and how many hands shaped the text that survives. The rest of this page traces that evidence across the Old Testament, the New Testament, the wisdom books, and the long question of divine versus human authorship.
Who Wrote the Old Testament?
The Old Testament was composed by dozens of authors, editors, scribes, and communities across roughly eight centuries. No single person wrote it, and no single century produced it. The 39 books of the Protestant Old Testament — or 24 books of the Hebrew Bible, counted differently but containing the same material — emerged from different kingdoms, different crises, and different literary traditions.
In a sense, "who wrote the Old Testament?" is the wrong question. The more accurate version is: who kept writing it? Older materials were collected, edited, expanded, and reframed by later writers across centuries. The result is not a single composition but a layered library, spanning from the earliest prophetic oracles around 750 BCE to the Book of Daniel around 165 BCE.
The historical narrative from Joshua through 2 Kings forms what scholars call the Deuteronomistic History — a connected account running from the conquest of Canaan to the Babylonian exile in 586 BCE. Martin Noth argued in 1943 that a single editorial school shaped these books using the theological framework of Deuteronomy: faithfulness to the covenant brings prosperity, unfaithfulness brings disaster. The editors drew on older court records, royal annals, and prophetic legends, and the books openly cite now-lost sources like the "Book of Jashar" (Joshua 10:13). Frank Moore Cross refined this in 1973, proposing two major editions — one during King Josiah's reign (~620 BCE) celebrating his reforms, and a second during the exile (~550 BCE) that reframed the whole story as one of covenant failure.
The prophetic books follow a different pattern.
Many are rooted in identifiable figures — Amos, a sheep breeder from Tekoa active around 750 BCE; Hosea, a northern prophet roughly his contemporary; Jeremiah, active during the last decades of the Judean monarchy. But the books bearing their names are not transcripts. A prophet spoke, disciples collected the oracles, and later editors arranged, supplemented, and reinterpreted them for new audiences. The book of Isaiah is the clearest example: since Bernhard Duhm's work in 1892, scholars have recognized that its 66 chapters span at least three settings — First Isaiah (chapters 1–39) from the 8th-century prophet of Jerusalem, Second Isaiah (40–55) from an anonymous prophet during the Babylonian exile around 540 BCE, and Third Isaiah (56–66) from the early Persian period. Three authors, three centuries, one book title.
The Writings hold some of the latest material. The Book of Daniel is set during the Babylonian exile but dates to around 165 BCE, during the Maccabean crisis under Antiochus IV Epiphanes — its "prophecies" describe events accurately up to that point and grow vague afterward, the standard marker of vaticinium ex eventu (prophecy composed after the fact). Christine Hayes of Yale describes the editors as choosing to preserve tradition even at the cost of consistency: contradictions were retained, competing accounts stood side by side. Michael Fishbane, in Biblical Interpretation in Ancient Israel (1985), documented how later biblical writers reinterpreted earlier texts within the Bible itself — a process he calls "inner-biblical exegesis." The Old Testament is, in this sense, a library in conversation with itself.
The Documentary Hypothesis: Did Moses Write the Torah?
Most scholars do not consider Moses the author of the Torah. The five books from Genesis through Deuteronomy — the first five books of the Bible, known collectively as the Torah or Pentateuch — show signs of multiple authors, writing styles, and theological perspectives woven together over centuries.
The evidence accumulated slowly, beginning with observations that now seem straightforward. The Torah describes Moses's own death and burial in Deuteronomy 34, and it refers to events and places that postdate his lifetime. In the 17th century, Baruch Spinoza and Richard Simon independently flagged these difficulties.
By 1878, Julius Wellhausen had synthesized decades of earlier work into the Documentary Hypothesis. In his Prolegomena to the History of Israel, he proposed that the Torah draws on four major literary sources: J (the Yahwist), E (the Elohist), D (the Deuteronomist), and P (the Priestly source). Each reflects a different community, period, and set of theological concerns. Richard Elliott Friedman's Who Wrote the Bible? (1987) brought this scholarship to a wide readership, tracing the distinct voices and agendas within the Torah's composite structure and showing how the sources can be separated and read on their own.
The specific four-source model has been debated and refined since Wellhausen. Some scholars now favor supplementary models — where a base text was expanded by later editors — over a strict documentary framework. But the core insight remains the consensus position: the Torah is a composite work drawn from multiple sources composed across centuries, with its final compilation dating to the Persian period, around 450–400 BCE.
Genesis offers the clearest window into this process. The two creation accounts in Genesis 1 and Genesis 2–3 differ in vocabulary, sequence, and theology — differences that map consistently onto the P and J sources identified throughout the Torah. Where one account has God create humanity last, as the crown of an ordered week, the other places the man first, before the plants and animals. Both were preserved, side by side, by editors who valued the traditions more than they valued smoothing over the seam. (For the terminology behind these five books, see Old Testament vs. Torah.)
Who Wrote the New Testament? Book by Book
The 27 texts of the New Testament were composed over roughly a century, from about 50 CE to approximately 120 CE. The earliest are not the Gospels — they are the letters of Paul, which predate any written Gospel by at least a decade. The dating of these texts relies on language analysis, references to historical events, and the literary relationships between documents.
Paul's letters split into three groups. Seven are undisputed — virtually all scholars accept them as authentically his. Others carry his name but diverge in vocabulary, style, and theology, leading most scholars to classify several as pseudepigraphic (composed in Paul's name after his death).
| Letters | Status | Scholarly view |
|---|---|---|
| Romans, 1 & 2 Corinthians, Galatians, Philippians, 1 Thessalonians, Philemon | Undisputed | Authentically Paul, composed ~50–62 CE |
| Ephesians, Colossians, 2 Thessalonians | Disputed | Scholars divided; often judged pseudepigraphic |
| 1 Timothy, 2 Timothy, Titus (the Pastorals) | Pseudepigraphic | Majority view: written in Paul's name, late 1st–early 2nd century CE |
Romans, composed around 55–58 CE from Corinth, is the anchor of this analysis — its authorship has never been seriously challenged. It also opens a window onto how ancient letters were actually produced. Paul did not physically write it; a scribe named Tertius did, and he signed his name in Romans 16:22 ("I, Tertius, who wrote this letter, greet you in the Lord"), one of the few scribes in the Bible to identify himself. The letter was carried to Rome by Phoebe, a deacon of the church at Cenchreae, who likely read it aloud and answered questions about it — making her, as Beverly Gaventa has argued, plausibly the first interpreter of Paul's densest theological arguments. Robert Jewett, in his 2007 commentary, reads the whole letter as an ambassadorial appeal for support of Paul's planned mission to Spain.
The Pastorals sit at the other end. Bart D. Ehrman notes that these three letters use roughly 300 words found nowhere in Paul's undisputed writings and reflect a church structure that had evolved beyond his lifetime. Ehrman treats pseudepigraphy at length in Forged (2011) and its academic companion Forgery and Counterforgery (2013) — an author composing in the name and tradition of a revered teacher, a recognized convention in the ancient world.
The Gospels were composed between roughly 65 and 100 CE, and all four are technically anonymous. The names Matthew, Mark, Luke, and John were attributed by later tradition, not by the texts themselves. Most scholars consider the Gospel of Mark the earliest (~65–70 CE), with the Gospels of Matthew and Luke following around 80–90 CE, both drawing on Mark as a source. The Gospel of John, the latest, dates to around 90–100 CE.
The Book of Acts was composed by the same anonymous author as the Gospel of Luke, around 80–90 CE. The two form a single two-volume work — Acts 1:1 refers back to "the first book," and both are dedicated to Theophilus. Henry Cadbury coined the term "Luke-Acts" in 1927 to capture that unity. The traditional attribution to Luke, a physician mentioned in Colossians 4:14, dates only to Irenaeus of Lyon around 180 CE. Much of the debate turns on the "we passages" (Acts 16:10–17, 20:5–15, 21:1–18, 27:1–28:16), where the narration shifts from third person to first-person plural. Some read this as an eyewitness signature; Vernon Robbins argued it follows a literary convention of ancient sea-voyage narratives; Richard Pervo treated the tension between Acts and Paul's own letters as too large for the author to have been a close companion.
Hebrews is the one New Testament text whose author is genuinely unknown. It carries no name, no location, no greeting — it opens with a theological prologue rather than a sender. For centuries it circulated under Paul's name, which helped secure its place in the canon, but virtually no critical scholar attributes it to Paul today. The Greek is more polished than Paul's, the theology develops a distinctive priestly Christology, and the author places himself in the second generation, having received the message "by those who heard" the Lord (Hebrews 2:3) — where Paul insists on direct revelation. Candidates proposed over nineteen centuries include Barnabas (Tertullian, ~200 CE), Apollos (Martin Luther, 16th century), and Priscilla (Adolf von Harnack, 1900). Harold Attridge calls Hebrews "the most sustained and elegant example of early Christian rhetoric that has survived." The 3rd-century scholar Origen of Alexandria reviewed the candidates and concluded: "Who wrote the Epistle, God alone knows." That verdict still stands. (For how texts like these came to be included at all, see who decided what's in the Bible.)
Who Wrote Proverbs and the Wisdom Books?
The Book of Proverbs is not the work of a single author — it names at least four contributors within its own text and reached its final form over roughly five centuries. Among the books of the Hebrew Bible, Proverbs is unusually transparent about its composite origins: its headings preserve the names of its contributors rather than folding everything under one attribution.
The opening verse credits "Solomon son of David, king of Israel" (Proverbs 1:1), and his name heads several sections (10:1, 25:1). But the heading at 25:1 is revealing — "These also are proverbs of Solomon that the men of Hezekiah king of Judah copied." Hezekiah reigned around 715–686 BCE, roughly two centuries after Solomon's traditional dates, which shows Solomonic material still being collected and arranged by royal scribes generations later. Most scholars treat Solomon less as the author of every proverb bearing his name and more as a patron figure whose reputation lent authority to an entire tradition. Roland Murphy describes the attribution as reflecting "a living tradition that continued to grow around the figure of the wise king"; Bruce Waltke similarly argues that the final editor arranged material that had accumulated over centuries rather than composing it.
Three other voices are named outright. "The wise" stand behind Proverbs 22:17–24:34; Agur son of Jakeh speaks in chapter 30 with numerical proverbs and a posture of radical humility; and King Lemuel's mother is credited in 31:1–9 — the only section of Proverbs explicitly attributed to a woman.
One section reaches beyond Israel entirely.
Proverbs 22:17–23:11 closely parallels the Egyptian Instruction of Amenemope, composed during the Ramesside Period (~1300–1075 BCE). Both organize their material into roughly thirty units, treat similar topics in similar sequence, and share specific phrasing — Amenemope's warning against robbing the poor is echoed almost verbatim in Proverbs 22:22–23. When the Egyptologist Adolf Erman published a detailed comparison in 1924, the parallels drew immediate attention. Miriam Lichtheim and most scholars conclude that the biblical author drew on Amenemope or a closely related source, placing Israel's sages within an international wisdom tradition shared across Egypt, Mesopotamia, and the Levant.
The same pattern of layered, attributed authorship runs through the other wisdom and poetic books. The Psalms, traditionally David's, are an anthology of temple worship spanning centuries — Hermann Gunkel's form criticism sorted them into laments, hymns, royal psalms, and thanksgiving songs from different liturgical settings. Ecclesiastes presents itself as the reflections of a king in Jerusalem, but its late Hebrew vocabulary and philosophical outlook place it in the 3rd century BCE; Choon-Leong Seow dates it to the late Persian or early Hellenistic period. Read as the anthology it is, Proverbs even preserves its own tensions on purpose: the famous pair at 26:4–5 ("Do not answer a fool according to his folly" / "Answer a fool according to his folly") is not an error but a feature of proverbial wisdom, gathered from voices who did not always agree. For more on how these texts work as writing, see the Bible as literature.
Did God or Humans Write the Bible?
Historians can establish that the Bible was composed by dozens of human authors over more than 1,000 years, in three languages, each shaped by specific historical circumstances. Whether God was involved in that process — through inspiration, dictation, or guidance — is a theological claim, and one that Jewish and Christian communities have answered in strikingly different ways across the centuries.
The two categories were not always seen as competing. For most of the Bible's history, the question was not whether God or humans wrote it, but how divine agency and human composition related to each other. That relationship has its own long history.
By the rabbinic period, a foundational principle had crystallized in Judaism: Torah min hashamayim, "Torah from heaven." Yet even that was not a single position. Philo of Alexandria, the 1st-century philosopher, described prophetic inspiration in terms drawn from Greek thought. The medieval commentator Ibn Ezra (12th century) quietly noted passages that seemed to describe events after Moses's time — Genesis 12:6's remark that "the Canaanite was then in the land" implies an author writing once the Canaanites were gone. Later scholars would build entire fields of inquiry on exactly these textual details.
Early Christian thinkers inherited these convictions and developed them in several directions. A key term is theopneustos ("God-breathed") in 2 Timothy 3:16 — a word that appears only once in the New Testament, in a letter most scholars consider pseudepigraphic, so the passage itself reflects a developing understanding rather than a settled doctrine. The church fathers did not speak with one voice. Origen of Alexandria affirmed inspiration but read difficult passages allegorically, treating their surface problems as invitations to deeper meaning. John Chrysostom emphasized synkatabasis, divine "condescension," in which God adapted the message to the limits of human language. Augustine held that the authors wrote without error in matters of faith while using the ordinary understanding of their time.
The Protestant Reformation brought new pressure to these questions.
With sola scriptura — the principle that the Bible alone is the final authority in matters of faith — what the text is became a central issue. Martin Luther treated the texts as authoritative but applied critical judgment, famously calling the Epistle of James "an epistle of straw." John Calvin developed an accommodation model echoing Chrysostom. The Westminster Confession of 1646 moved toward a more formalized position, declaring the Old and New Testaments "immediately inspired by God."
The most precisely defined doctrines are the most recent. As Julius Wellhausen identified multiple sources behind the Torah in the late 1800s and textual critics catalogued thousands of New Testament manuscript variants, some theologians sharpened their claims in response. Verbal plenary inspiration — the view that God guided every word of the original manuscripts without mechanical dictation — became dominant in conservative Protestant theology during this period. The Chicago Statement on Biblical Inerrancy (1978), signed by more than 200 evangelical leaders, offered the most systematic modern formulation, applying inerrancy to the original manuscripts, which no longer survive. Bart Ehrman, by contrast, opens Misquoting Jesus (2005) with an account of how his own encounter with those manuscript variants reshaped his understanding of these questions. The either/or framing of the title, in short, is largely a modern development — most of the traditions surveyed here would not have recognized it.
What the historical record shows is that the relationship between these texts and the divine has been understood in remarkably diverse ways, by the very communities that held them sacred. Uncanon presents the biblical texts in the order scholars think they were composed, with the historical setting, what scholars have found, and things to notice woven in before each passage — a reading plan built on composition order that lets you trace the evidence and weigh these questions on your own terms.