Leonard James Arrington was an American author, academic and the founder of the Mormon History Association (MHA). He is known as the "Dean of Mormon History" and "the Father of Mormon History" because of his contributions to the field. From 1972 to 1982, he was Church Historian for the Church of Jesus Christ of Latter-day Saints, the first non-general authority to fill the assignment since it began in 1842. He was director of the Joseph Fielding Smith Institute for Church History from 1982 until 1986.
The Mormon History Association (MHA) is an independent, non-profit organization dedicated to the study and understanding of all aspects of Mormon history to promote understanding, scholarly research, and publication in the field. MHA was founded in December 1965 at the American Historical Association (AHA) meeting in San Francisco under the leadership of Latter-day Saint and historian Leonard J. Arrington. In 1972, MHA became an independent organization with its own annual conferences and publications. The Journal of Mormon History, the official biennial publication of the association, began publication in 1974. MHA also publishes the quarterly Mormon History Newsletter and is an affiliate of both AHA and the Western History Association.