All Policy Analysis by Aaron Y. Zelin

Although attack statistics have declined, the continued lack of stable governance in Diyala and Deir al-Zour shows that Washington and its partners have not absorbed the lessons provided by previous insurgencies.

By the time IS came to the fore in Iraq and Syria, many of its themes and activities were already second nature to Tunisian jihadis who had heard similar messaging at home.

A deeper look into how one of the organization's Tunisian factions in Syria adopted and practiced an even more radical distortion of Islamic thought than its parent group.

How did a democratic bright spot in the Arab Spring become a leading source of Islamic State fighters? Read or watch an in-depth conversation with two jihadism experts.

How did Tunisia, a democratic bright spot of the Arab uprisings with very little history of terrorist violence within its borders before 2011, become one of the largest sources of foreign fighters for the Islamic State? This groundbreaking book presents the first history of the Tunisian jihadi movement and challenges simplified views of jihadism's appeal and success.

Fewer attacks and more prosecutions suggest the country’s integrated approach could eventually become a model for the region.

An in-depth interview on the scope of the terrorist group's remaining activities in Syria, Iraq, and other countries, including the potential for future insurgencies and mass-casualty attacks.

Given the group’s operational silence and loss of foreign help, it may not be able to launch the type of insurgency seen in Syria, but that could change if U.S. attention wanes militarily or diplomatically.

Three leading scholars assess the group’s status and ambitions following the death of its leader, and discuss how to handle the numerous potential supporters still residing in Syrian camps.

The Islamic State no longer governs territory, but aspiring jihadists can now point to a caliphate project achieved in their lifetime, a long-held yearning of the international movement.

The back-to-back deaths of the IS leader and allegedly one of his likely successors mark a significant counterterrorism accomplishment, but neither high-profile deaths nor the territorial loss of the so-called caliphate will translate into the organization’s defeat.

Recent U.S. decisions have seemingly ignored the degree to which the group is continuing its insurgent attacks and reorganizing its supporters inside increasingly vulnerable detention facilities.

Many inhabitants of the al-Hol camp still profess loyalty to the jihadist group and have sought to impose a fundamentalist lifestyle on their fellow residents.

Although it still relies on its stronger rival to operate, the ascendant affiliate has been cementing its presence in Idlib province, attracting other factions to its banner, and potentially setting itself up to lead a future insurgency.

The country is fast becoming a regional leader in meeting global CT norms, developing the necessary toolkits, and integrating its efforts with those of foreign governments.