MIDDLE EAST AFFAIRS: From Tunisia to Syria, the uprisings of 2011 showed how revolutions often give way to chaos or renewed authoritarianism, a lesson Jerusalem cannot ignore as Iran convulses.

With long-standing U.S. allies toppled or under pressure from unprecedented dissent across the Arab world, Michael Doran, in "The Heirs of Nasser" (May/June 2011), warns that Iran is poised to walk ...