Diplomacy

[crunk munki]

During occupation, you can cross into their territory, but they cannot cross into yours or create non-defensive units. Only accepted after you win a war (Writing)

Strategic alliances are mutual protection pacts between more than 2 nations (Nationalism)

You should also be able to demand that 2 civs make peace

Antiproliferation treaties prevent you and the other civ from producing any more nukes for 20 turns (Space Flight)

Disarmament treaties prevent you and the other civ from producing non-defensive units for 20 turns (Nationalism)

A UN council with the UN wonder

 

[Metacomet]

I like the idea, and we need more and more diplomatic options. I hope with conquest. Or maybe a new diplomatic/events expansion in the future...but probably CIV4