Diplomacy

Alliances - it should be difficult to get a nation to join an alliance (nobody desires war). See alliance documentation on the details of what impacts the chance to get a nation to join an alliance. Starfire is going to be designed such that there will be a 0% chance of a nation accepting an invitation to an alliance if relations are below +150.

Belligerence - a nation will gain belligerence while at war. While at peace a nation will lose 0.25 points of belligerence per month. A nation with a Head of State personality of "Power Hungry Demagogue" will have a peacetime reduction of 0.50 per month (i.e. they can be more aggressive with less ill effects from belligerence).