[Atrocities]

You can edit the AI Anger and Happiness files to prevent this, or at least slow it.

Many of us have issue with the sudden poltical changes the AI makes, but we have all grown used to it and now expect it.

THis is where mining your allies planets, warp points, and bases comes in handy. Also build stellor manipulation ships arm them with star killers and a cloaking device, place them on your allies star "to do research" and when they turn on you, and they will, you simply declare war and vaporize their systems until they surrender to you.