Empire

Empire is a capital city and its towns that share the same border type.

Players are allowed to have one non-genesis capital city.

Players are allowed to have multiple genesis cities.

Players are not allowed to have a genesis city and a non-genesis capital city (they need to pick one).

Each genesis city a player owns has its own empire.

Empires include the money invested and the background information as well. [does it include all genesis cities? or no?]