Answer:
If you are religious then you might believe in Adam and Eve and the Garden of Eden. But if you believe in science, then you would believe in evolution.
Sapiens or humans have been on the Earth for around 300,000 years.
Earlier ancestors existed 1.4 to 2 millions years ago.
Earliest writing is 5400 years old.
The bible is 2700 years old.
Why was there no record of Adam and Eve earlier?
Because they never really existed until someone created them.
The someone wasn't a deity . It was a man. A man who created a story.