Brigham Young said that the “mark of Cain” referred to Black skin, and taught that the descendants of Cain were cursed because the Old Testament figure murdered his brother in the book of Genesis. While initially open to Black men holding the priesthood, Young’s stance shifted in 1849, eventually hardening into firm opposition communicated through racist language. Although never presented as a “revelation,” his arguments played a key role in the creation of priesthood and temple restrictions that lasted until the 1978 revelation. In this interview, scholar W. Paul Reeve explores the history and legacy of Brigham Young’s racial teachings.