I finished my first game today. The only war I had was with the Dregin. By the time I went after them they had just 3 planets left. As I grew my fleet my culture seemed to be rolling over opposing factions. Planet after planet switching to my control. I wasn't even trying very hard to spread my culture.
So does anyone know how the AI reacts to cultural boundaries pushing into their space? Planet after planet and no war or any noticeable change in diplomatic relations. This game was set to normal using all factions. And how much do they push their cultural boundaries?