Countering Islamism requires several elements. First is defining the term and understanding that Islam is one of the world’s great faiths and that Islamism is not a religion but an ideology of power and control. Second is recognizing that radical Islamists seek to use that ideology to gain control for a violent, exclusionary, and expansionary agenda. Third is realizing that radical Islamists are both Sunni and Shia. The Sunnis, in the case of the Islamic State, must be defeated and the idea must be discredited—and only other Sunnis can do that.