Not so long ago, Turkey seemed to have found the elusive formula for foreign policy success. Its newly-adopted philosophy, “zero problems with neighbors,” won praise both at home and abroad as Ankara reengaged with the Middle East following a half century of estrangement. It expanded business and trade links with Arab states, as well as Iran, lifted visa restrictions with neighboring countries, and even helped mediate some of the region’s toughest disputes, brokering talks between Syria and Israel, Fatah and Hamas, and Pakistan and Afghanistan.