DNA studies:
wivesofjosephsmith.org/DNA.htm
deseretnews.com/article/1,5143,695226318,00.html
josephsmithjr.org/the-news/60-smith-descendants-other-wives
The introductory heading to D & C 132 states that Joseph Smith received the commandment to practice plural marriage in 1831, which is totally consistent in that he began a “translation” (i.e. inspired clarification) of the Bible in 1830 and finished that process in July 1833 with the New Testament, although he planned to go back and seek further inspiration about texts within the Bible after that initial completion. So he would have been reading in Genesis and asking God about the details of Genesis in 1830, in which case that is when he would have begun to question about Abraham and Jacob and plural marriage.
My post had stated that revelation even to a prophet may be an iterative process, which has to do with “line upon line, precept upon precept,” so although Joseph Smith was told an answer about a question in 1830 or 1831, that does not mean he received complete understanding about the subject, nor does the date of the writing down of a revelation mean it was the date of having received the revelation. So keep in mind two aspects of this–he was told why Abraham and Jacob had more than one wife in 1830, was told “you must begin living this principle” as a test of his own faith in about 1831, was further commanded about it in subsequent years, and received more detailed doctrinal understanding about the sealing power and about celestial marriage in the years 1836 (when Elijah and an Elias restored keys of temple work by coming as heavenly messengers to the Kirtland Temple) through 1842 when Joseph Smith wrote about temple work in a letter contained in D & C 128 based on the further guidance he had received on the subject, which would be because of asking further questions (seeking understanding) and receiving answers by inspiration and revelation.
Here is a source exploring the issue of “rumors” about Joseph and plural marriages:
en.fairmormon.org/Joseph_Smith/Polygamy/Fanny_Alger_and_William_McLellin
My point has been that the charge of “adultery” would pertain to having sexual relations (not whether he was sealed in an eternal marriage covenant) with a woman who was already married. There is no strong evidence that he had sexual relations with a woman who was already married–just rumors without evidence.
My point about adultery in general is that someone with a strong moral sense and strong desires to live by the commandments of God is going to keep the law of chastity and do it “easily” meaning that it is not a hard commandment to keep, in any of the forms it takes. Also, just because a couple of areas in Utah have high subscription rates that push up a statistic, does not generalize to the whole population of Utah.
If Joseph Smith was “guilty” under the commandments of God (as compared with in the view of some people who did not believe he was inspired by God), then his eyes would have shown that and sincere people would have seen that in his eyes. (That can be done even by looking at people’s eyes on television or in person–the eyes are the window to the soul.) His sincere followers would have seen a change in his eyes and would have been uncomfortable continuing to follow him–I’m talking about women and men of integrity and virtue themselves who had a strong moral sense and who would be able to discern virtue within the eyes of someone else, especially one serving as a teacher or leader. The rumors came from people disaffected with the church, or having an agenda to prove for whatever reason.