In the fall of 2009, relations between Serbia and Bosnia — never easy since the savage civil war of the 1990s — were slipping toward outright hostility. Western mediation efforts had failed. Ahmet Davutoglu, the foreign minister of Turkey, offered to step in. It was a complicated role for Turkey, not least because Bosnia is, like Turkey, a predominantly Muslim country and Serbia is an Orthodox Christian nation with which Turkey had long been at odds. But Davutoglu had shaped Turkey’s ambitious foreign policy according to a principle he called “zero problems toward neighbors.” Neither Serbia nor Bosnia actually shares a border with Turkey. Davutoglu, however, defined his neighborhood expansively, as the vast space of former Ottoman dominion. “In six months,” Davutoglu told me in one of a series of conversations this past fall, “I visited Belgrade five times, Sarajevo maybe seven times.” He helped negotiate names of acceptable diplomats and the language of a Serbian apology for the atrocities in Srebrenica. Bosnia agreed, finally, to name an ambassador to Serbia. To seal the deal, as Davutoglu tells the tale, he met late one night at the Sarajevo airport with the Bosnian leader Haris Silajdzic. The Bosnian smoked furiously. Davutoglu, a pious Muslim, doesn’t smoke — but he made an exception: “I smoked; he smoked.” Silajdzic accepted the Serbian apology. Crisis averted. Davutoglu calls this diplomatic style “smoking like a Bosnian.”