The 19th-century law of adoption was a short-lived Latter-day Saint temple ritual in which church members were sealed as children to people other than their parents. Between 1846 and 1894, thousands of men and women were ceremonially sealed—not just to biological parents, but often to prominent leaders such as Brigham Young and Heber C. Kimball. President Wilford Woodruff ended the practice in 1894, counseling members to be sealed to their biological parents. In this interview, historian Jonathan Stapley explains what the law of adoption was, why it mattered, and how its legacy continues to influence modern sealing practices today.