The short answer is: tradition credits , and that tradition goes way back — like, ancient. But the full story is more layered than that, and being honest about the complexity doesn't threaten your faith at all. It actually makes it more interesting, fr.
The Traditional Answer
Jewish tradition, Christian tradition, and even Jesus himself treat Moses as the author of the Torah — the first five books of the Bible, which includes Genesis. When Jesus quotes from Genesis or Deuteronomy, he often frames it as "Moses said" or "in the Law of Moses." That's significant. If Jesus is vouching for Mosaic authorship, that carries serious theological weight.
"Have you not read that he who created them from the beginning made them male and female?"
Jesus is quoting Genesis 1:27 here, and the way he appeals to it is with full authority. The earliest readers of Scripture didn't doubt where it came from.
But Wait — Genesis Doesn't Actually Say Moses Wrote It
Here's the thing nobody tells you in Sunday school: Genesis itself never says "Moses wrote this." The book is anonymous. The Mosaic authorship tradition comes from later texts in Exodus, Deuteronomy, and the New Testament — not from Genesis calling its shot.
That's not a conspiracy. Ancient texts worked differently. Authorship meant something closer to "this comes from this tradition or this figure's teaching" rather than "this one person sat down and typed it all out." Think of it like a school of thought being attributed to its founder.
What Scholars Actually Debate
Modern biblical scholars (since the 1800s) proposed something called the Documentary Hypothesis — the idea that the Torah was compiled from multiple source documents, usually labeled J, E, D, and P. You can actually spot some of what looks like "seams" in the text — like Genesis having two different creation accounts (chapters 1 and 2) with slightly different emphases.
This doesn't mean the Bible is broken. It means the question "who wrote Genesis?" might actually be "who collected and shaped these ancient accounts?" — and the answer could still orbit around Moses as the foundational lawgiver and teacher of Mount Sinai.
Many evangelical scholars take a middle-ground view: Moses wrote or compiled the core material, possibly drawing on earlier oral traditions or written records, and later scribes may have made minor editorial updates (like clarifying place names for a later audience). That's actually a pretty normal way ancient literature was assembled.
Does It Matter for Your Faith?
Lowkey, yes and no. Here's the thing — the authority of Genesis doesn't ultimately hinge on whether Moses personally wrote every word or whether he supervised a team of scribes working from older sources. What matters theologically is that it's Scripture: inspired, trustworthy, and doing exactly what God intended it to do.
The creation account, the fall, the call of Abraham, the covenant — none of that loses its power based on the composition history. The message is the message.
Where it gets more significant: if you believe Jesus affirmed Mosaic authorship, you have to take that seriously. Some scholars argue Jesus was using cultural shorthand ("the books of Moses" as a genre label, not a copyright claim). Others say Jesus straightforwardly believed Moses wrote it, and we should too. Both are represented in serious evangelical scholarship.
Bottom Line
Tradition says Moses. The New Testament echoes that tradition. Modern scholarship adds complexity without necessarily overturning it. And the text itself is more concerned with what it's saying than who's signing the bottom of the page.
You don't have to have a fully locked answer to read Genesis and let it hit. The God who created everything in chapter 1 is the same God whether Moses wrote it alone, compiled it, or passed it down through oral tradition for centuries before anyone wrote it down. That part? No cap.