Open Borders option not available

I'm playing Endless Space (with Disharmony), and I'm slightly confused by the diplomacy mechanics. I've made peace with another faction (Horatio, if it matters; I'm Sophons myself). I'd like to offer them to open borders, but when the option is greyed out in the menu, and if I hover over it, I get

The terms you request cannot be fulfilled.

Now I know they also need to have researched that diplomacy option, but I know they've got the Relativistic Markets tech, because I gave it to them.

What other requirements are there to open borders with another faction?

endless-space endless-space-disharmony

Best Answer

I think that they need to discover at least one of your systems before you can get open borders with them. I had the same problem and could only open borders when one of their scouts entered my system through a bordering wormhole.

Source: personal experience

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Is there any country with open borders?

Bolivia, Colombia, Ecuador, and Peru share open borders under the arrangement, allowing their citizens unrestricted freedom of movement in both countries without any need for identity documents (other than as routinely required for air travel).

How do I offer open borders in Civ 6?

For city-states, Open Borders is granted to players that have reached Suzerain status or slotted the Gunboat Diplomacy policy card. Jo\xe3o III also has Open Borders with all city-states due to his leader ability. Note that Traders and religious units are exempt from these rules, and may pass into closed borders.

What if there were no borders?

Imagine a world without borders. People and goods could cross freely between countries and a central government could rule everything. To some people it may sound like a utopia, while to others it could sound chaotic.

Is open borders good Civ 6?

Additionally, having Open Borders from another civ increases the amount of Tourism that the civ grants by 25%. This can be quite significant for players that are going for a Culture Victory in Civilization 6, and those fans should make sure to monitor the status of other leaders' borders throughout a game.

Japan Doesn't want you? But things might be changing - Japan border tourism information

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