“Our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world” (Eph. 6:12 NIV). For generations when Christians have engaged in spiritual warfare, most of the time they have focused on “satan” as the main opponent. However, C. Peter Wagner has gathered together a number of ministers who teach from personal experience that the “principalities and powers” are more than just satan—there is an entire hierarchy of demons in this world. Often, missionaries and ministers are finding that they have far more success in an area when they first go to war in the spirit and in prayer against the evil power that rules a certain region. C. Peter Wagner has compiled this book of many voices, speaking from Scripture and personal experience, teaching the reality of territorial spirits and the necessity of waging targeted, powerful warfare against them in order to reach the souls these evil powers have held captive for too long.