All Policy Analysis by Aaron Y. Zelin

A detailed survey of how many fighters have joined the Syrian jihad, where they come from, how their efforts compare to past jihads in Afghanistan and Iraq, and what European governments are doing about the issue.

Governments across the Middle East and far beyond are already changing their policies to address the problem of jihadist returnees from Syria, highlighting the scope and seriousness of the threat.

Security crackdowns will not be enough to eradicate jihadist networks in Tunisia and Libya, which have the patience and ideological conviction to weather drastic reorganization.

Israel and Jordan have together mounted a "well coordinated" effort to prevent the most extreme elements among the Syrian rebellion from dominating the southern front along both the Israeli and Jordanian borders, Middle East analyst Ehud Yaari told attendees at The Washington Institute's 2014 Weinberg Founders Conference. Yaari, the Institute's

A violent Libyan jihadist group is increasingly using aid efforts and religious education to cultivate a constituency abroad, not just at home.

A closer look at the numerous Saudis who have joined the fight in Syria and the potential consequences of their large-scale mobilization compared to past jihads.

The weeks-long internecine clashes are expected to continue hampering the rebel struggle against the Assad regime, with ISIS fighting on despite being ostracized by al-Qaeda and other jihadists.

The recent action highlights a central element in the battle for the global jihadist movement's future -- and could have important implications in the fight for Syria.