Stephen Cranney is a Non-Resident Scholar at Baylor University's Institute for the Studies of Religion, teaches at Catholic University of America, and has published over 30 peer-reviewed studies. His research has been featured in The Guardian, The New York Times, Deseret News, The Wall Street Journal, The Atlantic, and Christianity Today.

Stephen Bullivant is Professor of Theology and the Sociology of Religion at St Mary's University, UK, and Professorial Research Fellow in Theology and Sociology at the University of Notre Dame Australia. His books include Mass Exodus: Catholic Disaffiliation in Britain and America since Vatican II (OUP, 2019), Nonverts: The Making of Ex-Christian America (OUP, 2022), and, with Shaun Blanchard, Vatican II: A Very Short Introduction (OUP, 2023).