Nations

Nations are the major states that are vying for Victory in Old World.

A player Nation must be ruled by a member of the same dynasty as the Nation's founder. If the Nation's leader dies without a Heir the game ends.

Laws
Laws provide a permanent bonus to a Nation and cost either 250 or 400 Civics to implement. Laws come in mutually-exclusive groups of two.

Tribes
Tribes occupy certain City Sites at the start of the game. Tribes can be converted to a Religion and tribe characters can intermarry with Nation characters. Nations can conduct diplomacy with tribes.

Tribes that aren't allied with any Nation will eventually spawn a raiders army. Raiders are always at War with all Nations and will attack the nearest City. How far raiders are willing to travel depends on the game difficulty.

Barbarians
Barbarians occupy certain City Sites at the start of the game. They are always at War with all Nations and have to be defeated to claim the City Site.