A link-filled article discussing William Sargant's mid-century classic on John Wesley's "methodism" as the means of religious conversion in the 18th century, and its implications in the 21st.
https://www.reddit.com/r/cults/comments/9rxw41/sargant_wesley_and_the_evangelical_method/?
https://www.reddit.com/r/cults/comments/9rxw41/sargant_wesley_and_the_evangelical_method/?