Less Aggressive AI personalities
Reduces AI diplomatic aggression based on faction relationship level. The lower a factions relationship is, the more "eager" others are to attack it. By default, every faction is set to 100, so they attack each other with no thought about it, and the player could get attacked even from the other side of the world. So who knows why the relationship level even existed before.
Adds new personality values for aggressiveness (game default is and always has been 100): Aggressive = 100, Eager = 80, Moderate = 65, Peaceful = 50, Passive = 30.
So if your relationship level is high enough, some AI profiles will never attack you unless provoked. Most of the factions are considered "Eager" or higher.