Editing Golarion (section)

===River Kingdoms===
A vast territory of constantly rising and falling petty kingdoms, it's likely if it ever united it would be one of the most powerful nations in the Inner Sea since its comparable to Taldor and Cheliax in size, but they prefer fighting amongst themselves. All neighboring countries claim some bit of it but can never hold it long due to various reasons. Banditry is massively common and is expected by the populace, some even take up banditry as a bit of part-time work between their normal lives like fishing and farming. Has its own unspoken code called the "Six River Freedoms" which basically amount to:

#Say whatever you want, but don't be surprised if a Half-Orc punches you in the face when you call their mother uglier than a mountain troll.
#If you swear an Oath you keep it or you die, no exceptions.
#No one can block the use of the rivers or land travel or charge tolls other than in wartime. However if you get attacked whilst travelling them you're on your own.
#Within their realms all who are there are bound to whatever local laws exist.
#Slavery is utterly prohibited, and even wizards can get their ass bitten if they summon a creature in view of commoners.
#As long as you give the victim a chance to defend their belongings, you're allowed to steal and conquer their stuff. However if you steal their stuff and they don't get a chance to block it you're treated as a common criminal.

Basically Anarcho-Monarchists of the setting, but with more rivers. Also the home of the Kingmaker AP module, which let players build their own kingdom. Similar in concept to the Border Princes of Warhammer Fantasy.