Book 020, Number 4476: It has been narrated on the authority of 'Abdullah that the Messenger of Allah (may peace be upon him) said: The Caliphate will remain among the Quraish even if only two persons are left (on the earth) I personally think that if the Caliphate was given to an Indonesian, the Pakistanis and the Indians and the Malaysians ect... they will be jealous, heck they might even start to fight over it and might start overthrowing eachother, they are definitely no better than the Ansars... I believe it is best that the Caliphate be with a pure Qurashy Arab from Ahlul-Bayt. That's just a personal opinion as I said and I claim no consensus on this matter or anything else... just worth considering that's all.