“History is written by the winners,” said Accad. “But there was no winner in Lebanon.” ...

TIBNIN CASTLE, Southern Lebanon — The walls of a limestone citadel towering over olive groves near the frontiers of Lebanon, Syria and Israel tell the history of various civilizations that ruled here.

Lebanon, one of the most troubled countries in the Middle East, is once again at a critical crossroads. Several recent developments—a new leadership, a cessation of the Israel-Hezbollah conflict, and ...