It is explicitly stated in the Surah An-Nur, verse 55 - and also in many other verses - that the Islamic world will unite. In the Qur'an, Muslims say, “O Lord, make us leader of those who are God-fearing." That means the Islamic world has a leader, a chief. There is no mention of a leaderless society in the Qur'an, all the societies in the Qur'an have a leader. The Islamic world will have a leader [as well]. They have nothing [they can use] to deny that. - Harun Yahya