[Cronos]

Stability of the situation in erstwhile Saudi Arabia when the SAuds fall? -- it will be pretty stable, just as it was before 1918.

What would happen is that some dynasty (most likely the Jordanian Hashemites, as descendents of Muhammad) would control the Hijaz (Mecca and Medina), while various Saudi princelings would control the central area and there would be a Shia Imam in charge of the oil fields and an Ismaili state in the south.

[DoughtyOne]

Thank you Cronos.