The fall of ISIS will not have a major impact on the global struggle against violent extremism. It will be a tactical win which will generate little strategic effect. The strategic problem is the global struggle for the soul of Islam and the ever-growing wave of Islamist ideology. The source of most of this ideology is the Muslim Brotherhood, prominent in some 80+ countries around the world. If the ideology is not debunked and the source of it attacked, then tactical victories such as ISIS will be meaningless.