No one knows for sure, but these two explanations, perhaps in combination, may explain the abandoned cliff dwellings. Correct Incorrect 2.
Authorities often give two explanations for the departure of the Anasazi from their homeland.
Either they were starved out or they were driven out. Whatever the answer, and maybe it was a combination of drought and the invaders, the Anasazi departed to other places. Correct Incorrect 3. Their homes were very advanced in structure and design. They had good farms.