Collected Leonard J Arrington Mormon History Lectures

In 1973, Arrington accepted the appointment as the official historian of the Church of Jesus Christ of Latter-day Saints as well as the Lemuel Redd Chair of Western History at Brigham Young University. More and more Arrington focused on Mormon, rather than economic, historical topics. His own career flourished by the publication of The Mormon Experience, co-authored with Davis Bitton, and American Moses: A Biography of Brigham Young. He and his staff produced many research papers and position papers for the LDS Church as well. Nevertheless, tension developed over the historical process, and Arrington chose to move full time to BYU with his entire staff. The Joseph Fielding Smith Institute of History was established, and Leonard continued to mentor new scholars as well as publish biographies. He also produced a very significant two-volume study, The History of Idaho.

After Grace Arrington passed away, Leonard married Harriet Horne of Salt Lake City. They made the decision to deposit the vast Arrington collection of research documents, letters, files, books, and journals at Utah State University. The Leonard J. Arrington Historical Archives is part of the university's Special Collections. The Arrington Lecture Committee works with Special Collections to sponsor the annual lecture.