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Islam is one of the world’s three great monotheistic religions. Of them it is the youngest by several centuries and, perhaps for that reason, the most fervid and turbulent. It is also, in diverse forms, a political movement, reference and inspiration. Politics is a rough-and-tumble game. If the emergent Islamic parties of nations in transition — like the Muslim Brotherhood in Egypt and Ennahda in Tunisia — are to honor the terms of democratic governance they will have to concede that they have no monopoly on truth, that the prescriptions of Islam are malleable and debatable, and that significant currents in their societies have different convictions and even faiths.