World leaders, U.N. agencies, and relief organizations will gather in Istanbul on May 23 to 24 for the first-ever World Humanitarian Summit. Kemal Kirişci says that the decision to hold this summit in Turkey, made in 2013 on the basis of its generous foreign-assistance program and hosting of the world’s largest refugee population, has been complicated amid President Recep Tayyip Erdoğan’s authoritarian turn.