I tend to like these discussions and love reading everyone's views on this. Ill ask this question since it has been asked to me before and Im no scholar so ill see what yalls opinions are.

When cain killed able, who did he fear would kill him. In the bible he clearly references "the others." So the Lord placed a mark on him. If you go onto the next timeline of births it leads to some questions.

I had a person try and tell me one time kind of like it is being mentioned here. That their were other people and that adam and eve were the "first jews" created.