Within Mormonism, the priesthood authority to act in God's name was said by its founder, Joseph Smith, to have been removed from the primitive Christian church through a Great Apostasy, which Mormons believe occurred due to the deaths of the original apostles. Mormons maintain that this apostasy was prophesied of within the Bible to occur prior to the Second Coming of Jesus (see 2 Thessalonians 2:3) and was therefore in keeping with God's plan for mankind. Smith claimed that the priesthood authority was restored to him from angelic beings—John the Baptist and the apostles Peter, James, and John.