NABUMALI, Uganda (AP) — Among the most sensitive family disputes Moses Kutoi mediates are those involving upset men questioning why some of their children don’t resemble them. For the Ugandan clan leader attuned to the wisdom of his ancestors, the matter is taboo, never to be discussed with others. Yet Kutoi feels compelled to intervene in the hope of saving marriages that sometimes turn violent and are on the verge of breaking. “Even me, I don’t resemble my father,” the clan leader recently told one disbelieving man he was helping. Paternity has become a key test of faith in this...