I think that the global happiness takes the tedium out of managing cities. Before, like in Civ4, I didn't like how cities that I want to focus on research, I had to build happy buildings so that I could do research, or production, or anything. Global values for happiness allows more city specialization, and this is fun for me.
Shirley you're not suggesting that scientists don't need a little entertainment once in a while?
Anyway...
I've been thinking about the cassus belli idea a little. If I understand correctly, having CB against another civ would effectively reduce war weariness or even, in fact, incite a kind of bloodlust. I like it, it would be an interesting way to nuance the happiness mechanic (which some people have taken to thinking of as a stability anyway) as well as creating some interesting possibilities for diplomacy (CBs against a common foe being grounds for alliances, for example).
It's been brought up in this thread that, whereas it may be possible to implement this on the part of the AI, it would be difficult in the case of the player since we have no "official" position/attitude vis-a-vis the AI. (That's actually an interesting discussion in and of itself which should maybe be discussed in its own thread.) In a sense, though, a cassus bellie system would to a degree simulate an official stance towards the AI. Generally, an AI having cassus belli against you would be somewhere on the hostile side of neutral. Similarly, holding CB against AI would make you more likely to war with them than those against whom you do not have CB. This idea needs some refinement, but I'm just putting it out there for people to think about.
I'd like to address the establishment of cassuc bellie. I think it's possible to generate some objective criteria that could be used to establish cassus belli. These would be measurable and, therefore, could be applied equally to the player as to the AI making it a balanced mechanic.
Examples of objective grounds for CB (by no means a complete list, please suggest other objective grounds as well):
- You have taken one of my cities (major)
- You have attacked my trading partner (minor)
- You have attacked my ally (major)
- You worship a heathen god (only for theocracy - major)
- Your culture encroaches on our land (minor)
- Our people are miserable and you have refused to help (e.g. for refusal to trade luxuries if you are in negative happiness) (minor)
I've appended "major/minor" since different actions are clearly of different gravity. I think the way to implement this might be similar to golden ages in that there could be a counter with threshold values for different degrees of CB. I know that not all of the items listed (e.g. theocracy one) are be relevant to CiV but since we're kicking around ideas here, I decided not to limit it to existing CiV mechanics.
Note also, that some of them are only possible if civilizations have previously warred. This acknowledges the fact that some wars may be fought without cassus belli and simply due to the whims and greed of leaders. A desire to get that iron tile, for example.
Half fleshed out ideas, I know, but this is a forum for discussion after all!