This is a tutorial on how to make the game use only one type of settlement, cities.
By having only one settlement, settlements will seldom run out of things to construct, and each settlement can be specialized in a different way.
Part 1 - descr_campaign_db.xml
Part 2 - EDB
Part 3 - EDB
Part 4 - descr_strat
Part 5 - Debugging (what everone loves :P)