A Prince Disinherited

I just learned from Abu Aardvark that King Abdullah II of Jordan has removed his younger brother Hamza from the role of Crown Prince. The Arab world does not have the rule of primogeniture, so every succession has the potential to become interesting. Rulers have been trying the "Promise to let your brother be king after you" thing since the Umayyad dynasty, all convinced they can succeed where their own fathers failed.