In my first run as Mayan Nation all the other great empires collapsed in the early game after a while. Now (1257ad) this hasn't happened the last 450 years anymore, which has the consequence that the remaining world (Europe, Asia und Africa) is occupied by only 5 really huge empires.
Will there be any further "collapsing dates" or events? Or will this empires remain this huge and powerful until the end of the game?