Who Wrote the Bible? What Scholars Have Found
The Bible was not composed by a single author. It is a collection of 66 texts produced by dozens of writers across more than 800 years, from the oracle collections of 8th-century BCE prophets to the letters and narratives of early Christian communities in the 2nd century CE.
The question "who wrote the Bible?" has no single answer — and that in itself is a finding, the result of centuries of close textual analysis.
For most of Western history, traditional attributions went unquestioned. Moses composed the Torah. David composed the Psalms. Paul composed the letters bearing his name. Beginning in the 17th and 18th centuries, scholars started examining these claims against the texts themselves — looking at language, internal contradictions, historical references, and literary patterns. What they found reshaped the field and opened up questions that are still being refined today.
This page surveys the current state of biblical authorship scholarship — who composed the Old Testament, when the New Testament took shape, and how many authors contributed to the library we now call the Bible.
The Torah Question: Did Moses Write the First Five Books?
Most scholars do not consider Moses the author of the Torah.
The five books from Genesis through Deuteronomy — known collectively as the Torah or Pentateuch — show signs of multiple authors, writing styles, and theological perspectives woven together over centuries. The evidence for this accumulated slowly, starting 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, proposing that the Torah draws from four major literary sources: J (the Yahwist), E (the Elohist), D (the Deuteronomist), and P (the Priestly source). Each source 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.
The specific four-source model has been debated and refined since Wellhausen's time. 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 400 BCE.
Genesis provides a particularly clear window into this process. The two creation accounts in Genesis 1 and Genesis 2–3 differ in vocabulary, style, sequence, and theology — differences that map consistently onto the P and J sources identified throughout the Torah.
Prophets, Poets, and the Old Testament
The Torah is only part of the picture.
The Old Testament as a whole was composed by a wide range of authors — prophets, priests, court historians, poets, sages — across roughly 800 years of Israelite and Jewish history. The earliest texts scholars can date with confidence are the oracles of the 8th-century BCE prophets: Amos, a sheep-breeder from the Judean town of Tekoa who composed his oracles around 760–750 BCE; Hosea, active in the northern kingdom during the same era; Isaiah of Jerusalem (chapters 1–39 of the book bearing his name); and Micah. These prophets were responding to specific political crises — the Assyrian expansion, economic inequality, religious syncretism — and their compositions bear the marks of those circumstances.
Other Old Testament texts emerged from entirely different contexts.
The book of Proverbs is attributed to Solomon in its opening verse, but scholars identify at least five distinct collections within it, assembled over centuries, with the final compilation dating to the post-exilic period (~450–400 BCE). The Psalms are similarly a compiled anthology — individual compositions span centuries, though the collection as a whole was assembled around 400–300 BCE. The book of Daniel, composed around 165 BCE during the Maccabean crisis, is one of the last parts of the Old Testament to be completed.
Christine Hayes of Yale has noted that understanding the Old Testament requires treating each text as a product of its own time — reading Amos as an 8th-century voice, not through the lens of later theological developments. The Old Testament is not one book with one perspective. It is a library assembled over generations.
Who Wrote the New Testament?
The 27 texts of the New Testament were composed over roughly a century, from about 50 CE to approximately 120–150 CE.
The earliest New Testament writings are not the Gospels — they are the letters of Paul. His undisputed letters, composed between roughly 50 and 62 CE, include Romans, 1 Corinthians, 2 Corinthians, Galatians, Philippians, 1 Thessalonians, and Philemon. Paul wrote these to specific communities dealing with specific problems, and they predate any written Gospel by at least a decade. The dating of New Testament texts relies on language analysis, references to historical events, and literary relationships between documents.
Six additional letters carry Paul's name but show differences in vocabulary, style, and theology that lead most scholars to classify them as pseudepigraphic (composed in Paul's name after his death). Ephesians, Colossians, and 2 Thessalonians are disputed. The Pastoral Epistles — 1 Timothy, 2 Timothy, and Titus — are considered pseudepigraphic by a strong majority of scholars, likely composed in the late 1st or early 2nd century CE. Bart D. Ehrman has written extensively on this practice, noting that pseudepigraphy was a recognized literary convention in the ancient world — an author composing in the name and tradition of a revered teacher.
The Gospels were composed between roughly 65 and 100 CE.
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 of the four, dates to around 90–100 CE. All four are technically anonymous — the names Matthew, Mark, Luke, and John were attributed by later tradition, not by the texts themselves.
Then there are books whose authorship remains genuinely uncertain. Hebrews is anonymous — the text never names its author, and scholars have proposed candidates ranging from Paul to Apollos to Priscilla without reaching consensus. Acts, traditionally attributed to Luke, shares an author with the Gospel of Luke based on literary analysis, but the identity of that author remains debated.
Language, Transmission, and the Text We Have
The Bible was not originally composed in English.
The Old Testament was composed primarily in Biblical Hebrew, with portions of Daniel and Ezra in Aramaic. The New Testament was composed entirely in Koine Greek — the common Greek of the eastern Mediterranean world. The languages of the Bible are themselves evidence of the historical circumstances behind each text.
The transmission history adds another layer. The Hebrew text underlying most modern Old Testament translations is the Masoretic Text, standardized by Jewish scribes between the 7th and 10th centuries CE from earlier manuscript traditions. But an older Greek translation — the Septuagint, produced in Alexandria beginning in the 3rd century BCE — sometimes preserves readings that differ significantly from the Masoretic version. The Dead Sea Scrolls, discovered in 1947, provided Hebrew manuscripts a thousand years older than the earliest Masoretic copies, and they confirmed that multiple textual traditions circulated in antiquity.
These are not minor copyist errors.
The Septuagint version of Jeremiah is roughly 15% shorter than the Masoretic Text, with material arranged in a different order. The book of Daniel includes passages in the Septuagint (the Prayer of Azariah, Susanna, Bel and the Dragon) absent from the Hebrew. The "Bible" that early Christians read was the Septuagint — which means the Old Testament they knew was, in places, materially different from the Hebrew text that later became standard in Jewish tradition. Emanuel Tov's work on textual criticism has shown that these variations are not corruptions but evidence of living, evolving literary traditions.
The Big Picture: How Many Authors?
Scholars estimate that at least 40 to 50 distinct authors contributed to the Bible, though the actual number is almost certainly higher once anonymous editors, redactors, and compilers are included.
The full count depends partly on how you count — whether you include the separate sources behind composite texts like the Torah, or only the final compilers. The traditional estimate of roughly 40 authors, common in many church traditions, is based on counting one author per book and accepting traditional attributions. Scholarship revises that number upward. The Torah alone draws on multiple source traditions. Isaiah contains material from at least three different prophets, composing across a span of roughly 250 years. The Psalms are an anthology compiled from compositions by many hands.
The question of divine versus human authorship has its own history. The concept of biblical inspiration developed over time, and different communities have understood the relationship between divine and human agency in the text in very different ways. The texts themselves do not all make the same claims about their own origins — some prophets explicitly claim to speak on behalf of God, while others (like the author of Ecclesiastes) compose in an entirely human, philosophical register.
What scholarship has established is that the Bible is a deeply human library — composed by people in specific places, responding to specific crises, drawing on the literary and theological traditions available to them.
Understanding who those people were, and what they were responding to, changes how these texts read. If you want to encounter these texts with that kind of context — who composed them, when, and why — Uncanon provides scholarly framing before every passage, organized in the order the texts were actually composed. The texts. The evidence. The historical context. And room to draw your own conclusions.