So before buying Galciv II, I read a bit about it. The dominant feature that I saw was wars, conflict with the AI, and other such stuff of that nature.
So I started up a few games on the easier difficulty levels, played around a bit, and was never attacked by the AI. Alright, I thought, the problem is that I'm not using enough military races, and the galaxy isn't large enough. So I start a new game, including the Thalians, Torians, Arceans, Terrans, and the Yor (I'm playing as a custom race) on a gigantic galaxy. I got the Snathi and Dark Yor as minor races, too. The only war that happens is between the Arceans and the Yor, and the only action taken against me is the Arceans demand tribute upon first meeting me, but don't do anything when I refuse. The Snathi and Dark Yor build nothing but constructors and freighters, which sit in orbit around their worlds. None of the other races relations towards me ever go below neutral, and slowly progress towards close as the game advances.
Well, I think again, clearly the problem there was that by the time I met other races, I was too advanced and they didn't want to challenge me. So I started another game with the Drengan, Yor, Torians, and Thalians in a small galaxy. It started out well. The Drengans started building up a military, relations degraded to "cool", and I felt like I had to build an actual military in case they attacked. For the first time, ships with mass drivers circled my worlds to repel an invasion. Then, nothing happened. The Drengan got culturally squeezed between me and the Thalians (the two leading races), were unable to keep up with only 4 planets, and eventually the Torians declared war on them and destroyed them. The Yor never even bothered building a fleet, and the Thalians seemed unwilling to use theirs, despite their military superiority, both in tech and numbers.
So, what am I doing wrong? Why do the AIs not go to war? Is there some "aggressiveness" slider that I missed? Do neutral civilizations not get attacked? Do I need to play a game with all the evil races and nothing else? What do I need to do to get warmongering AIs?