Italy. An academic trained at the Foundation for Religious Sciences John XXIII in Bologna. He is a professor of historical theology at Villanova University (Philadelphia) and a contributing editor for Commonweal magazine. His most recent publications include the books: History and Evolution of Catholic Movements. From Leo XIII to Benedict XVI (2011); Vatican II: The Battle for Meaning (2012); True Reform: Liturgy and Ecclesiology in Sacrosanctum Concilium (2012); Pope Francis and the “church-world” (2014); The Rising Laity. Ecclesial Movements since Vatican II (2016).