Ludwig is correct. As within Christianity, a reformation is highly likely to take place and arguably is already under way as is evident through large numbers of Muslims taking a pragmatic approach to the letter of the book. Again as in the Christian sphere, fundamentalist are always likely to exist and they will manifest their particular versions in the Islamic equivalents of Christian cults, some in remote places until they fizzle out (as with Guyana where they drank from a vat of poison) or in eccentric groups among and in close contact with the rest of society (Amish, JW, Scientology, Latter Day Saints, etc.). Each will take their own position on "the Word" and insist their view is correct and everybody else's is wrong. To this extent there is no difference among the various religions. It will take the Muslim world some time to go through the process and, given modern communications, travel, etc., the rest of the world has become and will remain involved for some time to come. It is my belief that, whereas the process took Christianity some centuries to complete, Islam will from now reach a similar "steady state" in about the sort of time it took Communism to go through its lifespan from the Marx-Engels ideas to date (less than one and a half centuries).