Philip Layton Barlow is a Harvard-trained scholar who specializes in American religious history, religious geography, and Mormonism. In 2019, Barlow was appointed associate director of the Neal A. Maxwell Institute for Religious Scholarship. Barlow was the first full-time professor of Mormon studies at a secular university as the inaugural Leonard J. Arrington Chair of Mormon History and Culture at Utah State University (USU), from 2007 to 2018.

Mormon studies is the interdisciplinary academic study of the beliefs, practices, history and culture of individuals and denominations belonging to the Latter Day Saint movement, a religious movement associated with the Book of Mormon, though not all churches and members of the Latter Day Saint movement identify with the terms Mormon or Mormonism. Denominations of the Latter Day Saint movement include the Church of Jesus Christ of Latter-day Saints, by far the largest, as well as the Community of Christ (CoC) and other smaller groups, include some categorized under the umbrella term Mormon fundamentalism.