I like to play with a mod that requires 3 stars in the Neolithic. I've also played with a 2-star Neolithic. The 2-stars works fine. It seems the AI has no problem advancing then, but with 3 stars at least one, if not more of them get stuck and can never advance. If you find the time, can you make it so that the AI automatically advances after a period of time? It's impossible, or nearly so, to quash the little buggers since they keep popping up, so give them a break. I'm playing on Humankind level with expert AI's and you would think they could get their act together before all the animals disappear, but no.