Joseph Smith Jr., Joseph Smith III, Joseph Smith, Joseph F. Smith, John F. Taylor, Sidney Rigdon, John Taylor, Joseph B. Noble, and others, many of whom are in the Book Of Mormon, founded the Church of Jesus Christ of Latter-day Saints.
They are the ancestors of modern-day Latter-Day Saints.
These early Mormon leaders are often credited with introducing polygamy to the Americas.
Polygamous marriages were common in the early history of the Americas, and in the 19th century, the practice was also widespread in parts of the South.
These marriages were arranged and practiced for the purpose of raising children and eventually establishing a new family in the new country.
The book of Abraham and the Book