I'm very excited with the pro-active AI towards removing aggressive civs.
Problem is, they behave just like the nuclear war civs in Civilization 3. In my last game, the Drengin were conquering everyone. Eventually, everyone jumped them and I was able to (with no military whatsoever) take over almost all their planets just by converting my colonyships and explorers into large transports.
Trouble is, once everyone's at war with them, anyone they make peace with immediately declares war on them again because of their "aggression" towards the other civs that declared war with them, and there's no way they can ever survive.
This might not be what you intend.
