This is part 8 of a series of posts on Doctrine and Covenants Section 132, Joseph Smith’s July 12, 1843 revelation on marriage. See Part 1, Part 2, Part 3, Part 4, Part 5, Part 6, Part 7. For the follow on post, part 9, go here.
In Nauvoo, two notions of “kingdom expansion” in the hereafter developed in logical tension. They had textual roots from the New York and Kirtland periods.
(1) Kingdom expansion for a person in the hereafter was based on having many earthly progeny. In this way, after death and the exaltation of those children, their own godlike activities of world peopling and priesthood connection made one a greater “king and priest.”
(2) More wives in mortality meant faster growth of progeny in the hereafter somehow, though precisely how or what that meant was not really fleshed out until after Joseph’s death (by Orson Pratt, W. W. Phelps, Eliza R. Snow, Brigham Young and others)—in short, it entailed pregnancy and birth of, not physical bodies, but “spirit” bodies—Pratt saw heavenly gestation as comparable to mortal, hence the advantage of multiple wives.