trade route

I think multiple trade routes to and from specific cities should be limited, it makes sense and is good for balance. A simple way to do it would be making a hard limit on trade routes. To ensure there's no conflict between internal and foreign trade routes, the limit should be for both. So if...

What the title says: How do I create a trade route with a City State. Clicking on the city state's title bar opens the details for that city state, but I don't see anything there that would allow me to create a trade route with them. And I have a quest to open a trade route with them. The only...