Mormonism comprises the religious, institutional, and cultural elements of the early Latter Day Saint movement and its modern denominations deriving from the leadership of Brigham Young and/or the religious innovations introduced by founder Joseph Smith, Jr. in 1840s Nauvoo, Illinois. Most specifically, the term Mormonism is used to refer to The Church of Jesus Christ of Latter-day Saints (LDS Church). The term also applies to Mormon fundamentalism, and to various reformist churches such as the… (More on Mormonism)