Answer:
most historians of the Islamic State agree that the group emerged out of al-Qaeda in Iraq as a response to the U.S. invasion in 2003. They also agree that it was shaped primarily by a Jordanian jihadist and the eventual head of al-Qaeda in Iraq, Abu Musab al-Zarqawi. The Jordanian had a dark vision: He wished to fuel a civil war between Sunnis and Shiites and establish a caliphate. Although he was killed in 2006, his vision was realized in 2014—the year isis overran northern Iraq and eastern Syria.
Explanation:
