The original paper [1] is more interesting to read. "Whether it was a primary or substantial factor is impossible to know, but drought can lead to devastating

The original paper [1] is more interesting to read. "Whether it was a primary or substantial factor is impossible to know, but drought can lead to devastating consequences when coupled with preexisting acute vulnerability, caused by poor policies and unsustainable land use practices in Syria’s case and perpetuated by the slow and ineffective response of the Assad regime (13)" [1] http://www.pnas.org/content/112/11/3241.full.pdf http://www.pnas.org/content/112/11/3241.full.pdf