Why internal conflicts end and what it might mean for Syria.

Why internal conflicts end and what it might mean for Syria. The war in Syria is in its seventh year and there are few signs that an end is in sight. Yet over the years, other seemingly intractable civil conflicts have, eventually, been resolved. So, how did they do it and what lessons are there that might help Syria?

(A Kurdish Syrian woman walks with her child past the ruins of the town of Kobane in northern Syria. Credit: Yasin Akgul/Getty Images)