All pious Muslims well-read in the Hadith (the compiled sayings of the Prophet*) firmly believe in the need to establish an Islamic State headed by a Muslim Caliph. This is mentioned twice in the Holy Quran and it’s central to the Islamic faith. No Muslim scholar would debate an Islamic state and the caliphate.
[Sami Moubayed, Syrian historian and former Carnegie scholar writing in the Daily Telegraph, 23rd September, 2015]
*ﷺ Peace and blessings of Allah be upon him