This volume, dedicated to the memory of Gerard Mannion (1970-2019), former Joseph and Winifred Amaturo Chair in Catholic Studies at Georgetown University, explores the topic of changing the church from a range of different theological perspectives. The volume contributors offer answers to questions such as: What needs to be changed in the universal church and in the particular denominations? How has change influenced the life of the church? What are the dangers that change brings with it? What awaits the church if it refuses to change? Many of the essays focus on people who have changed the church significantly and on events that have catalyzed change, for the better or for the worse. Some also present visions of change for particular Christian denominations, whether over the ordination of the women, different approaches to sexuality, reform of the magisterium, and many other issues related to change.