Answer:
Unilineal cultural evolution
Explanation:
Unilineal cultural evolution is inspired by the work of Charles Darwin, proposes that the diversity of human cultures represent different stages of development, from simple to complex.
This theory proposed that human social structures were develop or evolved along a common track from simple hunting and gathering communities to literate civilizations through a series of stage( a stage from simple to complex). The theorist of this theory were of the opinion that cultures also originated from a single point stand which later divided into many forms.
Unilineal cultural evolution which was formulated in the 19 centuries is now discredited.