A French writer wrote in the early 90's a book named "Failure of Political Islam", this was certainly true back in the early 90's, where Islamism has stopped to function with politics in the Arab world, ever since the collapse of the Arab Caliphate, and the Ottoman Islamism taking over. Tho a lot of my friends would argue that Islamism have never ruled to fail in the Arab world, and that it has been interfering with Politics ever since new ideologies were adopted, but i still remain to disagree that it has been directly involved in political decision making, (excluding Saudi Arabia and perhaps Sudan). The Formation of an Islamic State, in my opinion, will never be achieved, the Arabs have failed to create one unified state, it will take Muslims around the world, centuries more to come, to achieve a unified state, which will not happen, because simply people are too nationalistic to allow a foreigner to rule them, just because he follows the same religion as they do. Obviously, today, with the Islamists taking power in Tunisia, forming the largest block in Egypt, and leading the way in Libya, Syria and Yemen, it is no question that they will be in power, perhaps they all differ in smaller things, such as constitutional, or government bases, take the recently elected majority party in the Parliament of Tunisia, Al-Nahda Party, with their announce of building a secular state, that treats everyone similarly, and another example are the Radical Islamists of Egypt, calling for the re-creation of the caliphate state, with the Quran being its constitution. in addition their are several Islamist political entities that are all different in ideology and how they view Islam, yet are all united under the labeling themselves as Islamists. such as the Ikhwan (Muslim Brotherhood), whom are the strongest political entity in Egypt, the Salafists (radical Islamists), yet they themselves are divided over several political parties, and finally the Sufis, who have no political experience, and were never targeted by the government.