Last fall, having observed that few women in Istanbul took martial-arts classes, I conceived the idea to work with local instructors on creating a women's self-defense initiative. My project met with initial enthusiasm, particularly among women concerned with the high rate of domestic violence in Turkey. But other martial arts instructors in the city grew uneasy, sensing a plot to swindle them out of their small pieces of the martial-arts pie. Istanbul quickened with lunatic rumors that the initiative was a conspiracy to disparage the other instructors' martial prowess and steal their students. Martial-arts cliques consumed...