Oops guys, I should have said Caesar farted, Oh Well. I suspect that answer that you are looking for may be found in a high level college anthropology text book on the Mayans. I remember reading a discusion of that factor in a Indian antro text book 30 years ago in college, which one I don't remember at this time.
Note Anthro was not my main field of study at the time. The anthro classes were my Under Water Basket Weaving Classes at that time ie easy A's.