Moving from Tribalism to Feudalism

• The option to do this is on the *Intrigue* dialog, you may have to scroll up to see it.  Like most CK2 things look at the roll over popup for details.
• The keys are to have:
•  Laws -> Realm -> Tribal Organization to Max
• Have a Castle or Stone Hillfort (I think your capital needs to be in the same county as either of them.
• How your council is leaning is showed on the tooltip *if* you let it stay up for a while.
• Possible Bug🐛I was not able to change type until more than 6 months after the time the tooltip showed.  I was able to 15 months later.