Massimo Faggioli is professor of theology and religious studies at Villanova University and a contributing editor for Commonweal. Among his books with Liturgical Press are True Reform: Liturgy and Ecclesiology in Sacrosanctum Concilium (2012); Pope John XXIII: The Medicine of Mercy (2014);and Sorting Out Catholicism: A Brief History of the New Ecclesial Movements (2014).