People in the time of Enosh (of his race) began worshipping gods. Enosh also means man; he was the third after Adam, the red. He, (his race) according to his name, was the first humanoid actually looking like modern man. Adam was the first creature that differentiated himself intellectually from the animals. The first humanoids (Homo Erectus) and human races must have coexisted next to each other for a period of time.
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Until the generation of Enosh the faces of the people were "K'kufot".
(they looked like apes...)
Bereshit rabbah 23;9
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At one point in history the humans (Homo sapiens) took the upper hand. This is figuratively pictured in the story of Jacob, cheating his ignorant brother Esau out of his birthright with some soup.
Then Jacob gave Esau bread and pottage of lentils,
and he ate and drank, and rose and went his way. Thus Esau despised his
birthright.
Ge 25:34
RSV
Esau was
completely covered with red hair.
The first came forth red, all his body like a
hairy mantle; so they called his name Esau.
(Hairy)
Ge 25:25