Little known in America but venerated as a martyr in Iran, Howard Baskerville was a twenty-two-year-old Christian missionary from South Dakota who travelled to Persia (modern-day Iran) in 1907 for a two-year stint teaching English and preaching the gospel. He arrived in the midst of a democratic revolution—the first of its kind in the Middle East—led by a group of brilliant young firebrands committed to transforming their country into a fully self-determining, constitutional monarchy, one with free elections and an independent parliament. The Persian students Baskerville educated in...