What caused the ruin in thee anasazi people?

The decline of the Ancestral Puebloans, often referred to as the Anasazi, was primarily due to a combination of severe drought, resource depletion, and social factors. Prolonged periods of drought in the region led to crop failures, which strained their agricultural society. Additionally, over-exploitation of land and resources, coupled with social unrest and conflict among communities, contributed to their eventual abandonment of settlements in the late 13th century. These factors collectively resulted in the gradual decline of their civilization.