The essay examines architectural forms produced by prehistoric Southwestern agricultural societies, linking the emergence of permanent masonry dwellings to irrigation, calendrical observation, and solar cults. It traces how seasonal needs and storage practices shaped room types and settlement permanence, contrasts Pueblo and cliff-dweller masonry with Old World examples to argue that building technique does not strictly reflect technological stage, and outlines a morphological classification of domestic, storage, and sacred structures. The author also emphasizes recurring worldwide principles in the organization of utilitarian versus ritual buildings arising from shared human needs.