I'm wondering if there's any authoritative literature out there on diplomacy systems. I'm at the very beginning of my research, for instance I just found out through gamedev, that the term diplomacy describes what I'm looking for.
Before that, I was looking for
alliance systems without much success.
1) Could someone point me in the right direction for further research into the topic?
Initiailly, I was looking for something like in eve online, where people are organized into individuals, fleets, alliances, all of which can, as far as I know, declare war or peace on each other.
2) Is there open source code I can study on the subject?
3) What are some considerations when comparing diplomacy systems?
I mentioned Eve Online, but at this point, I'm open to inspiration from all genres. What are some interesting ones out there?