The Arab and Muslim world stands at a crossroad. One direction indicates dictatorship. A mixed bag of absolute rulers and Islamists have different aims, but a common belief in their right to be wielding power and killing anyone in their way, with weapons of mass destruction if they can acquire them. Taken together, they are condemning their own and other people to permanent violence and regression. And in the other direction, reform. A different mixed bag of Arab and Muslim oppositionists, intellectuals, dissidents and exiles are trying to devise the sort of pluralist or open society that alone is able...