One of the greatest humanitarian disasters in Syria to date is looming. Syrian President Bashar al-Assad and his backers, including Russia and Iran, have steadily regained control of most of the country. The northwest governor of Idlib and its surroundings in northern Hama and Aleppo countryside are the rebels’ last stronghold. Now Damascus and its allies are applying their brutal efforts there. While the immediate threat to civilians there is dire, if Assad isn’t stopped what comes after could be even worse.