What about the ability for war to not automatically be declared when attacked. A pop-up would show up saying "retailiate with war?" or something along those lines. The only time war is immediatly declared is when a Civilication formlly declares war on you. There would be a war or peace meter on each nation giving a percentge on how much they want to go to war with them. For example, constently having AI pass through your territory will make them want war. Long and unsuccesfull war campaigns make them want peace. If you attack people while the pecent is less than fifty bad things will happen. Citizens will get made and eventually Anarchy will develop. The drasticness of the effect of war or peace could change with governents.
