William P. Payne is the professor of evangelism and world missions at Ashland Theological Seminary. He has authored American Methodism: Past and Future Growth (2013) and Adventures in Spiritual Warfare (2018). Additionally, he is a combat veteran, a seasoned pastor, an international speaker, and a spiritual warfare consultant. He teaches on world Christianity, world religions, folk religion, cultural anthropology, evangelism, mission theology, and spiritual warfare.