>History has shown that an alien invasion can only happen because of the internal competition and in-fighting of the natives.
Not true. Overwhelming technological advantage also works. As Hilaire Belloc put it:
Whatever happens, we have got
The Maxim gun, and they have not.
The AI arms race is a race for that kind of advantage. Whoever wins (assuming they don't overshoot and trigger the "everybody dies" ending) becomes de-facto king of the world. Everybody else is livestock.
I used to think this, but the AI labs sure seem neck-and-neck in the model race. Doesn't appear that anyone is developing an enormous lead. So I've become skeptical of the runaway king-of-the-world-maker model scenario.
The open models seeming to be ~6 months behind is very encouraging, too.