Does Anyone REX?

[Barghaest]

Random question - what needs to be true to have trade routes over water as Carthage? I have four cities, all coastal, all have the free harbor, no trade routes.

EDIT: Nevermind, you got I see.

Thought there was a setting in Technologies that affected it (meaning you had to research certain tech to unlock) but I can't find the setting listed... must be coded into the game itself to disallow trade routes until the Wheel (although I could've sworn I'd gotten em pre-Wheel with Iroquois by having continuous friendly woods connecting cities).