Over the last decade, a new theory and practice of spiritual warfare has taken hold around the world. This teaching proposes the existence of a newly discovered class of demons, 'territorial spirits', whose function is to rule over specific jurisdictions of different sizes. Along with this theory has come a new practice of spiritual warfare: ruling demons are named, their territories identified and they are then bound or cursed. Evangelism and mission are ten said to proceed raplidly with dramatic results. Chuck Lowe examines the full range of biblical intertestamental, historical and empirical evidence cited in promotion of this new teaching. Lowe affirms that we need to be involved in spiritual warfare and proposes a more biblically legitimate and effective model.