Iran thundered onto the world stage in 1979 with an Islamic revolution that shook the world. Today that revolution has gone astray, a popular democracy movement boldly challenges authority, and young Iranians are more interested in moving to America than in chanting "Death to America." Afshin Molavi, born in Iran and fluent in Persian, traveled widely across his homeland, exploring the legacy of the Iranian revolution and probing the soul of Iran, a land with nearly three millennia of often-glorious history. Like a master Persian carpet maker, Molavi weaves together threads of rich...