SP dominion kills on turn 1

[Admiral_Aorta]

The AI is really dumb and sometimes takes really low dominion on their pretenders. This combined with dominion reducing events and other nations close by can result in a domkill.

[Knai]

I'd also add that the AI is really incompetent with some nations. For instance, Mictlan doesn't get automatic temple checks, and as such tend to die horribly (despite being a domkilling powerhouse nation).