What Does Genesis 11:12 Mean?

When Arphaxad had lived 35 years, he became the father of Shelah. The post-Flood genealogy's ages at fatherhood are dramatically shorter than the pre-Flood equivalents: Arphaxad fathered Shelah at 35, compared to pre-Flood figures who waited 65-187 years. This compression of the pre-fatherhood years is a feature of the entire post-Flood genealogy and may reflect a general shortening of the overall lifespan trajectory. Whatever its cause, it means more generations fitting into a shorter calendar span than in the pre-Flood period.

Shelah appears as a name in the New Testament genealogy of Jesus in Luke 3: Arphaxad, Shelah, Eber, Peleg, Reu, Serug, Nahor, Terah, and Abram. The New Testament genealogy confirms the Old Testament's genealogical chain and traces it all the way to Adam and to God. Every figure in Genesis 11's otherwise arid genealogy is, in Luke's account, a link in the chain that ends with the announcement that Jesus is "the Son of God." The genealogy of nations narrows to the genealogy of salvation.

The 35 years before Shelah's birth situates Arphaxad firmly in the Babel period if the chronology is read sequentially. The sons of Shem were having children during the same generations in which Babel was being built and confused and scattered. The covenant line did not pause for the Babel crisis; it continued its patient, generational progress toward the man who would be called out of the post-Babel world to become the father of a new kind of people. History's crisis did not interrupt grace's genealogy.