I am indifferent to whether on not the game I play has a lot of wars or not, but I would like to share my observations up to this point from my second game (first game was mostly experimenting with the new features) using the huge earth map from the YnAEM mod. I must note that I am using the 28 Civ DLL with it (I am pretty sure that it only changes the player cap and nothing else).
I am playing England so I do not expect much war on my part early game given my island separation 'advantage'. I like to emulate history (settling in areas England would of historically) and thus I also tend to be less aggressive focusing instead on wide empire tactics. I only go to war when I really have to.
Game Settings: Epic speed, Prince difficulty, 26 civs, 22 CS, true starting locations
IMPORTANT EDIT: I forgot that I have also included the 'Less warmongering hate' mod (http://forums.civfanatics.com/downloads.php?do=file&id=20358). This should in theory makes things more peaceful???
Observations:
1. Shaka has conquered the bottom half of Africa and is constantly aggressive towards me with denouncements. Most of the other players have denounced him and I always receive invites to join in on attacking him. He is also attacking various CS at random points in the game but it mostly ends in stalemate.
2. Spain conquered Portugal within first 100 turns and then settled down and has not said peep for a while!
3. Poland conquered Berlin and 2 Greek cities early game and is pretty much the enemy of every player north of the equator! I have been alerted to atleast 4 'world wars' in the past 200 turns where Poland is at war with at least 3-5 European and Asian civs simultaneously. He has a very good army and can hold all his captured territory at this stage. I get constantly spammed to join these wars from almost each player. France and Japan tend to be the major opposing forces in the most recent battle fielding armies up to 10 units against Poland
4. Egypt and Greece are constantly arguing and battling on and off. Greece lost a city but its mostly small skirmishes.
5. Barbarians are breeding like cockroaches in dark undisturbed corners of the map such as Siberia, Greenland, Australia and upper North America. I have just settled in Australia and the bugs are now running around like crazy. Luckily quite a few militaristic CS have been donating free units with a few popping up in Australia just in the nick of time
6. Upon arriving and settling in North America, I noticed that the Americans and Aztecs have not made much progress due to barbarians out of control in the Rockies. (I don't have any native American civs in this game).
7. Arabia is wonder and religion spamming and won't go to war at all. I gather the AI knows its on to a good thing and won't break it.
8. China, India and Siam have also had a few skirmishes in the past but tend to be a bit more chilled out in the last 100 turns.
9 (EDIT) Indonesia...well...it has populated a few islands in its location but has not done much of anything else
My overall view is that the game has a better feel (for an Earth map) than G&K and I like the fact that players are not going schizo DoWing themselves into oblivion for no real gain.
As others have stated, there is too much at stake with trade routes and culture so it feels like civs are more calculated and pick their fights where there is something to gain 95% of the time. Some players are functioning on negative or single digit GPT and thus can't do much warring any way!.
The exceptions, Poland and Zulu did quite a few bad things early game and thus the 'underlying AI numbers' for those civs mean constant war around those areas.
I noticed that Europe and upper Africa, where most of the congestion is, tends to be more of a powder keg. Thus I gather proximity factors have a lot to do with aggression. The North American civs who have more breathing space tend to be more passive!!!
My conclusion is that the diplomacy and warfare in BNW feels more 'balanced' and the AI is holding its cards much closer to its chest than G&K. This is a good thing in my mind as I prefer playing with an AI that has reason for aggression rather than a random out of the blue 'well I guess this means war!" DoW by 3 distant civs at the same time for no reason!