The are straight up one of the wildest mysteries in the entire Bible — and yes, the debate about who (or what) they were is very much still going. 6:1-4 drops this cryptic passage right before the flood narrative, and theologians have been arguing about it for literally thousands of years. Here's what we know, what we don't, and why it actually matters.
The Verse That Started It All {v:Genesis 6:1-4}
When man began to multiply on the face of the land and daughters were born to them, the sons of God saw that the daughters of man were attractive. And they took as their wives any they chose... The Nephilim were on the earth in those days, and also afterward, when the sons of God came in to the daughters of man and they bore children to them. These were the mighty men who were of old, the men of renown.
So yeah. That's a lot to unpack. "Sons of God." "Daughters of men." Mysterious giants. Men of renown. Moses just drops this like it's normal and keeps moving. Lowkey iconic. But also — who ARE these people??
Theory 1: Fallen Angels (The Most Ancient View)
The oldest interpretation — held by most early Jewish writers and many early church fathers — is that "sons of God" means Angels, specifically fallen ones. The Book of Enoch (a Jewish text that's not in most Protestant Bibles but is quoted in Jude) goes deep on this, naming these angels the "Watchers" who left their heavenly post to chase human women.
This view gets traction from places like Jude 6 and 2 Peter 2:4, which reference angels who "did not stay within their own position of authority." The Nephilim, in this reading, are literal angel-human hybrids — supernatural, terrifying, and part of why God decided the whole situation had to be reset.
This interpretation hits different because it explains why the flood was necessary: the human genetic/spiritual line had been corrupted beyond fixing.
Theory 2: The Sethite View
Another major camp says "sons of God" just means the godly lineage of Seth (Adam's third son), who started intermarrying with the ungodly line of Cain. The Nephilim then = the morally corrupted offspring of that mixed union. No supernatural beings required.
This view dominated a lot of medieval Christianity and keeps things more… naturalistic. The problem? It doesn't fully explain why the text calls these dudes "mighty men of renown" or why they seem to be in a category all their own.
Theory 3: Divine Kings (The Ancient Near East Take)
A third view, popular in academic biblical scholarship, reads "sons of God" as powerful rulers or semi-divine kings — a category that made total sense in the ancient Near East, where kings regularly claimed divine descent. The Nephilim = their elite warrior offspring. Powerful, famous, feared.
This squares with the "men of renown" language and fits the literary context: Genesis is showing how human pride and power had gone completely off the rails before the flood.
They Show Up Again — In Canaan
Here's where it gets interesting. The Nephilim don't just vanish after the flood. Numbers 13:33 has the Israelite spies reporting that they saw Nephilim in Canaan and felt like grasshoppers next to them. Whether that's a literal sighting or the spies exaggerating out of fear (the text seems to hint at the latter), the idea of the Nephilim had become shorthand for "terrifyingly large and powerful people."
Some scholars connect this to the giant clans — the Anakim, the Rephaim — that Noah's descendants later encountered. And yes, this is the tradition that eventually gives us Goliath.
So What's the Right Answer?
Fr, no single view has a consensus across all of evangelicalism. Serious scholars and seminary professors hold all three positions. The angel interpretation has the most ancient support and best explains the New Testament references. The Sethite view avoids some theological complications about angels and human reproduction. The divine ruler view fits the cultural context.
What everyone agrees on: the Nephilim passage is setting the stage for why things had gotten so bad that God grieved making humanity at all (Genesis 6:6). Whether it's corrupt bloodlines, corrupt rulers, or corrupted spiritual beings — the world had gone sideways. Deeply, catastrophically sideways.
The flood wasn't random. It was a reset. And these mysterious "mighty men of old" are part of why.