Jordanian experts on Islamism, Mohammad Abu Rumman and Hassan Abu Hanieh, address the key questions regarding the differences and relationship between the so-called "Islamic State" and the Al-Qaeda network. They provide deep insights into both organizations and illustrate the internal conflicts that led to the IS's split from Al-Qaeda and the emergence of two rivals in the global jihad. What are the central ideological pillars of the IS? Where does its rapid expansion and military strength come from? How is it structured and what resources does it have? What are the underlying conflicts between the IS and the Al-Qaeda network? How do the IS and Al-Qaeda, as well as the Al-Nusra Front, differ ideologically? What scenarios are conceivable for the future? How will the engagement of the international coalition against the IS impact the situation?.