Who believed in "unity of production" which led to the development of the director?

The person behind the so called "unity of production" was Wagner. 

He demands sought to filter all stage expressions through a single artistic  consciousness. To realize his goal, he built a new kind of theater building and it was the first in the West to do away with the box, the pit, and the gallery arrangement in favor of a democratic configuration. Wagner's contribution to the development of the director came from his strong demand for "unity of production" which meant everything has been filtered through a single consciousness to achieve a unified artistic effect.

During the paleolithic, hominins grouped together in small societies such as bands, and subsisted by gathering  plants  and fishing, hunting or scavenging wild  animals. the paleolithic is characterized by the use of knapped stone tools, although at the time humans also used  wood  and bone tools.

It depends on what you believe, if you’re christian that you would have been told that the first humans were created by god and that we’re all decedent's from adam and eve but scientist say otherwise