I mean, apart from the archaeologist part that seems pretty sane to me to ask if you're an atheist or at least a skeptic.
https://www.biblegateway.com/passage/?search=Genesis%204&version=NIV
Adam and Eve have two kids, Cain and Abel.
Cain kills Abel (8). Cain gets cursed. (11) Cain is afraid he'll be killed by... ??? (14). God is all, nah fam karma mark lmao. (15) Cain goes and lives in the land of Nod. (16) Cain, one of three living humans at this point, makes love to his wife, who randomly now exists, and births a son, Enoch. Cain also builds a city... for the now five people who live on Earth. (17).