What exactly does authority do?

[Naja]

I know that if you've got a king with lots of authority, it's less likely that your generals and captains will rebel.

But are there any other effects of high and low authority?

[Krusadr]

there are alot more effects on some mods. take stainless steel. if the king has very low authority, a civil war could take place, in which some of your generals will rebel, will not move, and wont leave a city they are in. If a rebelling general is in a city, unrest in the city soars, and the population decreases like crazy.

[Naja]

What else is there in vanilla Medieval 2?

[MattErickson]

It boosts public ratings and income in cities, and has an effect on diplomacy.

[daffyff]

What about generals with attributes that give influence who aren't king?