Page "Ancient Pueblo Peoples" Paragraph 51

The period from 700-1130 CE ( Pueblo I and II Eras ) saw a rapid increase in population due to consistent and regular rainfall patterns.

Studies of skeletal remains show that this growth was due to increased fertility rather than decreased mortality.

However, this tenfold increase in population over the course of a few generations could not be achieved by increased birthrate alone ; likely it also involved migrations of peoples from surrounding areas.

Innovations such as pottery, food storage, and agriculture enabled this rapid growth.

Over several decades, the Ancient Pueblo culture spread across the landscape.