The ancient Maya once occupied a vast geographic area in Central America. Their civilization extended to parts of what is now Mexico, Honduras, and El Salvador, and most of Guatemala and Belize. From the third to the ninth century, Maya civilization produced awe-inspiring temples and pyramids, highly accurate calendars, mathematics and hieroglyphic writing, and a complex social and political order. Looking at the impressive remains of ancient Maya civilization, it's hard to imagine how such a society could collapse. Does that clear it up ?