Charles Peter Wagner (August 15, 1930 – October 21, 2016) was a theologian, missiologist, missionary, writer, teacher, and church growth specialist best known for his highly controversial writings on spiritual warfare.
Wagner served as a missionary in Bolivia under the South American Mission and Andes Evangelical Mission (now SIM International) from 1956 to 1971. He then served for 30 years (1971 to 2001) as Professor of Church Growth at the Fuller Theological Seminary's School of World Missions until his retirement in 2001. He is the author of more than 70 books. He was the president of Global Harvest Ministries from 1993 to 2011 and served as the chancellor emeritus of Wagner Leadership Institute, which trains leaders to join in a movement known as the New Apostolic Reformation, an organization Wagner also helped found. He was also the vice president of Global Spheres, Inc.
Read this for a research project. I'm not inherently opposed to the ideas of spiritual warfare and even territorial spirits. I think Christians would do well to be aware of spiritual realities. To his credit, Wager lays out a clear, well-thought-out, and understandable argument in this book.
However, I think Wagner overestimates both the power of demons and the power of humans to deal with them (I think he makes both too close to the power of God). He repeatedly says that his view is just an interpretation and that there isn't hard biblical proof for what he's advocating, yet at the same time sets the stakes so high that people would feel they are abandoning their evangelistic duty if they disagree with him.
Also the heavy kenotic Christology left a bad taste in my mouth. Some Pentecostals and Charismatics have a bad habit of making it seem like Jesus was just a Spirit-filled man just like us.