How do you Break an Alliance

Couldnt find a way myself.Though i considered paying a non ally to attack the ally,and help the non-ally win

I think you just have to wait for it to expire. They do eventually expire.

Get everyone else to declare war on them and let them die.

Cast curgens volcano on them until dead.

Maybe I'll think of something else

But yeah, unless they die you have to wait for 99 turns to get rid of an alliance.

I just don't think my sovereign can like somebody that long.  I like the volcano idea.

This is something that would be nice to use influence for: to break treaties

I really like this idea, maybe have cost scale off of how much your factions like each other (just calc your factions like towards them similar to how comps decide they like you.) Influence has too few uses as is if you start getting a lot of it, such as having wanderlust + heroic I ended a game with 5.6k influence, even using it to trade for tech constantly.

I'm more worried about another problem. What I liked about GC2, is the ability to give or sell the units, and the bases (outposts) to an ally. It was real opportunity to help other civs. In this game we don't have such capabilities...

I would like to be able to help Allies and close friends more.  Unless I am playing as Verga.  If a sovereigns tells me they are being crushed by so and so, and I am playing as Verga.  I usually declare war on the weakling.