What Does Genesis 10:25 Mean?

Two sons were born to Eber: one was named Peleg, because in his time the earth was divided; his brother was named Joktan. Peleg's name provides one of the few interpretive glosses within the genealogy: his name means "division," and the text explains that in his time "the earth was divided." This note places the Table of Nations in temporal relationship with the Babel event: if the earth was divided in Peleg's lifetime, then Babel and the subsequent scattering of nations occurred within the span covered by this genealogy.

The two sons of Eber divide the Semitic world into two streams. Peleg's line narrows further toward Terah and Abraham, reaching its destination in chapter 11. Joktan's line spreads outward into the Arabian peninsula with a remarkable thirteen sons listed in the following verses. The Arabian descendants of Joktan fill the southern portion of the Semitic world while Peleg's descendants carry the covenant line northward. The division at Eber is a genealogical fork whose two branches will never reunite in the biblical narrative.

The Peleg note, "in his time the earth was divided," is one of the most debated phrases in Genesis. Taken in its context alongside chapter 11, it most naturally refers to the Babel scattering. Whatever the precise nature of the division, it took place within the lifetime of a specific man in a specific generation of the covenant line. The babel event was not mythological or time-less; it happened during the years that Peleg was alive on the earth, remembered specifically enough that his name commemorated it. History, for Genesis, is specific.