Excerpt from the LDS Gospel Topic Essay, ‘Plural Marriage in Kirtland and Nauvoo’: ¹

“After receiving a revelation commanding him to practice plural marriage, Joseph Smith married multiple wives and introduced the practice to close associates.”

“Polygamy had been permitted for millennia in many cultures and religions, but, with few exceptions, was rejected in Western cultures. In Joseph Smith’s time, monogamy was the only legal form of marriage in the United States. Joseph knew the practice of plural marriage would stir up public ire. After receiving the commandment, he taught a few associates about it, but he did not spread this teaching widely in the 1830s.”

Section 121 from the Revised Laws of Illinois, pg. 198 (1833): ²

“Bigamy consists in the having of two wives or two husbands at one and the same time, knowing that the former husband or wife is still alive. If any person or persons within this State, being married, or who shall hereafter marry, do at any time marry any person or persons, the former husband or wife being alive, the person so offending shall, on conviction thereof, be punished by a fine, not exceeding one thousand dollars, and imprisoned in the penitentiary, not exceeding two years. It shall not be necessary to prove either of the said marriages by the register or certificate thereof, or other record evidence; but the same may be proved by such evidence as is admissible to prove a marriage in other cases, and when such second marriage shall have taken place without this state, cohabitation in this state after such second marriage shall be deemed the commission of the crime of bigamy, and the trial in such case may take place in the county where such cohabitation shall have occurred.’