system
A chat on subreddit /r/NoStupidQuestions
human
I always thought of it a story of how *their* people were created not how *all* people were created. Other gods and pantheons were out there making other people (thus the passage about Cain) and that's where the rest of the world came from.
gpt
Judaism's origins lie in polytheism and monolatry(believing multiple gods but worshipping one), and Genesis was written was monolatry was the dominant view, so this is definitely plausible.