The Pueblo people never disappeared, of course: Diverse groups developed their own, competing civilizations after the Ancestral Puebloans migrated or fell apart.
Ancestral Puebloans seem to have abandoned their urban areas around 1300 C.E. The disappearance of this civilization remains a mystery, although most scientists say Ancestral Puebloans engaged in warfare with their Navajo neighbors, internal groups competed for land and resources, and sustained droughts reduced Ancestral Puebloan ability to irrigate crops in the arid Southwest. The Pueblo people never disappeared, of course: Diverse groups developed their own, competing civilizations after the Ancestral Puebloans migrated or fell apart. These groups include the Zuni and Hopi civilizations.