Now we have barbarian Tomahawks and barbarian Battleships.
Anybody willing on theorize over that? You get a cookie for creativity
Hmmm...Alright.
The last Civ is a barbarian/pirate/indian/nomad Civ (not sure who a leader would be, lots of possibilities.) They kind of act as a villain of the trade routes, and get money for intercepting and destroying caravans and cargo ships. They are able to enter other nations borders from the start (thus making it easier to destroy the caravans)