Joseph Smith Jr. stated that he was disturbed by all the different denominations of Christianity and wondered which was true. In 1820, when he was 14, he went into the woods to pray concerning this and allegedly God the Father and Jesus appeared to him and told him not to join any of the denominational churches.

Three years later, on Sept. 21, 1823, when he was 17 years old, an angel called Moroni, who was supposed to be the son of Mormon, the leader of the people called the Nephites who had lived in the Americas, appeared to him and told him that he had been chosen to translate the book of Mormon which was compiled by Moroni's father around the 4th century. The book was written on golden plates hidden near where Joseph was then living in Palmyra, New York. Joseph Smith said that on Sept. 22, 1827 he received the plates and the angel Moroni instructed him to begin the translation process. The translation was finally published in 1830 as the Book of Mormon. Joseph claimed that during this translation process, John the Baptist appeared to him and ordained him to accomplish the divine work of restoring the true church by preaching the true gospel which, allegedly, had been lost from the earth.

The Book of Mormon is supposed to be the account of people who came from the Middle-East to the Americas. It covers the period of about 600 B.C. to 400 A.D. It tells of the Jaredites, people from the Tower of Babel who came to central America but perished because of their own immorality. It also describes some Jews who fled persecution in Jerusalem and came to America led by a man called Nephi. The Jews divided into two groups known as the Nephites and Lamanites who fought each other. The Nephites were defeated in 428 A.D. The Lamanites continued and are known as the American Indians. The Book of Mormon is the account of the Nephite leader, Mormon, concerning their culture, civilization, and appearance of Jesus to the Americas.

After the publication of the Book of Mormon, Mormonism began to grow. Because their religion was so deviant from Christianity, i.e., plurality of gods, polygamy (Joseph is said to have had 27 wives), etc., persecution soon forced them to move from New York to Ohio, then to Missouri, and finally to Nauvoo, Illinois. After being accused of breaking some laws in Nauvoo (for destroying a printing press that was publishing harmful information on Mormonism), Joseph and his brother Hyrum ended up in jail. A mob later broke into the jail and killed Joseph and his brother.