Muhammad was not a caliph__Abu Bakr was made the first caliph.<quoted text>
First of all, you're not welcome. This is part of the Muslim history and culture since Mohammed.
There have been many caliphs since Mohammed and many eras of caliphates but not since the 1920s.
Most Muslims believe the next one is the "biggy" and the final one...as stated by the Muslim Brotherhood's founder "either by political means or by force".
Do you want to learn anything? Or do you like living in the Land of Stupid on purpose?
No wonder this country is so screwed up.
The final Abbasid caliph/caliphate went down with Baghdad in 1258 when the Mongols came to town, since then Islam has been in disarray particularly during the long period of Ottoman rule.
Some but not most Muslims wish for a new caliphate (central power) but it won't happen for obvious reasons.
Your ignorance on the subject should embarrass you.