Mario S. De Pillis (January 22, 1926, in

Philadelphia, Pennsylvania Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the Unit ...

– November 18, 2021) was an

emeritus ''Emeritus/Emerita'' () is an honorary title granted to someone who retires from a position of distinction, most commonly an academic faculty position, but is allowed to continue using the previous title, as in "professor emeritus". In some c ...

professor of American Religious history at the

University of Massachusetts Amherst The University of Massachusetts Amherst (UMass Amherst) is a public land-grant research university in Amherst, Massachusetts, United States. It is the flagship campus of the University of Massachusetts system and was founded in 1863 as the ...

. De Pillis specialized in the history of such groups as the

Latter-day Saints The Church of Jesus Christ of Latter-day Saints, informally known as the LDS Church or Mormon Church, is a Nontrinitarianism, nontrinitarian Restorationism, restorationist Christianity, Christian Christian denomination, denomination and the ...

and

Shakers The United Society of Believers in Christ's Second Appearing, more commonly known as the Shakers, are a Millenarianism, millenarian Restorationism, restorationist Christianity, Christian sect founded in England and then organized in the Unit ...

. He was the second president of the

Mormon History Association 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 ...

who was not a member of The Church of Jesus Christ of Latter-day Saints, any other

Latter-day Saint movement The Latter Day Saint movement (also called the LDS movement, LDS restorationist movement, or Smith–Rigdon movement) is the collection of independent church groups that trace their origins to a Christian Restorationist movement founded b ...

church, or a former member of any such church. De Pillis had a bachelor's and master's degree from the

University of Chicago The University of Chicago (UChicago, Chicago, or UChi) is a Private university, private research university in Chicago, Illinois, United States. Its main campus is in the Hyde Park, Chicago, Hyde Park neighborhood on Chicago's South Side, Chic ...

and a Ph.D. from

Yale University Yale University is a Private university, private Ivy League research university in New Haven, Connecticut, United States. Founded in 1701, Yale is the List of Colonial Colleges, third-oldest institution of higher education in the United Stat ...

. De Pillis and his wife, the former Freda M. Rustemeyer, were the parents of three sons. De Pillis was a Catholic.

Sources

Article by Jan Shipps mentioning some of De Pillis' work
1926 births 2021 deaths University of Chicago alumni Yale University alumni 21st-century American historians American male non-fiction writers University of Massachusetts Amherst faculty Educators from Philadelphia Historians from Pennsylvania 21st-century American male writers {{US-historian-stub