I was just thinking and have some questions about some entity tags:
1)[SCOUT] [WANDERER] [BEAST_HUNTER] what do they exactly do?
2)the triggering tags from population, production, trade are they or/and related?
3)What are the behaivors expected from SIEGING/AMBUSHER/THIEF/SNATCHER/SKULKING and their combinations?
4)Will restricted bioms and medium sized areas let civ's warring and still be alive? (i make a mode where i want all other creatures be just [CANCIV][CANLERN] but no speak so they all will be agressive (expect my antmans 
5)About pets, how would you do that your playing civ have a restricted (few) pets available, and others preferebalie still have their normal ones but you cant tame does creatures (maybe i will remuve mechanic so no capture?) but still it is hard to separate with only one kind of domestic tag.
1) In worldgen, creatures of that civ will "explore the area", "begins wandering the wild", and "begins hunting exotic beasts in...". It helps them get kills. Explorers and wanderers have a higher chance of finding creatures. Hunters seem to actively go after wild beasts in the area.
2) Based on fortress wealth and population. These basically say when a certain civ can start trading/siege
3) Siegers siege, ambushers ambush, thieves shief, snatchers snatch. Awfully specific wasn't it? They appear to be non-related. Each token allows the civ to do that action. I'm not sure about skulking.
4) I don't think civs that are very far apart can war against each other.
5) There are only a few tags that can be used to classify pets, such as [EVIL] and [BENIGN]. You might want to look into mounts.