Though the Protestant Reformers of the 16th to the 18th centuries demanded religious liberty from the Roman Catholic Church, in many cases they did not give liberty to others. That they persecuted Baptists and others who differed from them is a fact rarely told in church histories and therefore little known, but it is a fact that we document in this book. We first examine the roots of the doctrine of persecution in the teaching of Jerome and Augustine, then document its ugly exercise by Calvinists, Lutherans, and Anglicans in England, Europe, and America.