Droughts of 40 to 70 years and longer have occurred repeatedly throughout the southwest and Mexico. Long term drought is the most believed reason that the Mayans abandoned their cities also. Water is life. The entire area is subject to el nino and la nina Pacific conditions.
The people chose to move. Scientists say because of natural causes, but we will never know for sure the true reasons they left.
They actually didn’t disappear. They migrated to the south and assimilated with other groups to make up what we now know as the 19 associated Pueblo tribes of Arizona, New Mexico, and Texas. The Hopi, Zubi, and Ohkay Owingeh are examples of these tribes.
No one really knows.
It is nature's circumstances that change the place
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