If Adam and Eve were the first people and if Cain and Abel were elder and younger sons respectively..then when Cain killed Abel due to jealousy and was being banished..he was afraid. So God put a mark on his head and said that whosoever sees this mark will not cause you harm...Cain being the eldest who was he afraid of?

Competition. Just guessing.

I think the question is: Were there other humans outside of the garden of eden, and if so where did they come from, if Adam/Eve were supposedly the 'first humans'?

I haven't read genesis in ages, so I'm not claiming the bible implies anything any which way....I'm just trying to interpret/restate another's question.

If I were Cain, I would be afraid of living through all the ages, only dying by suicide "no one will harm a hair on your head" and being judged on Judgement day and his final fate sealed, forgiven or not.
He is afraid of retribution as promised by God. He is afraid of God.
BTW I believe he is at this time Osama Bin Laden.
I believe he has been Adolf Hitler and many others throughout time.

He knew that those of the coming children of Adam and Eve could in time take his life because of his killing of Able. Their lives at that time were very long....hundreds of years!

The implication is that Adam & Eve & their offspring had been very fruitful & multiplied numerous times. So there were many people on the planet at the time of this story.

tf73

Hi, He Cain was jelous because Abel's Sacrifice of meat was greating received by god than his fruit.
You could say he was slightly afraid of God himself aswell.

So he killed his brother.

"Genis 4"

Sailorboy.....

Cain was afraid of the Neanderthals that were outside the Garden. There is now scientific evidence that Homosapeins and Neanderthals co-existed. When Cain left the Garden he went and lived in the land of Nod,east of Eden. ....and he got married and had children. Cain was long gone, living in a city he built and named after his son (Enoch) and had kids and grandkids, before Adam and Eves next child was born. They named him Seth.
Eve said, "For God hath appointed me another seed instead of Abel, whom Cain slew."
Recent evidence shows traces of Neanderthal in much of our population living today.

The first word for man in the old testament can be translated man, mankind, or species. So translated Gen. 1:26, could read....Let us make (man, mankind, or species) in our own image. So when God says there..."let us make man..." he could have been saying, make the first living man and call him Adam, or let's make mankind in our image or make a specific species (homosapeins?) in our image. I'm not sure which I lean towards in belief.

Things we do know from the scripture.....Cain was afraid that someone would kill him when he was thrown out of the Garden. He was afraid right then, not at some future point years away that a sibling or cousin might kill him. And Cain married someone, and it wasn't his sister, since he didn't have a sister at that time.

The obvious conclusion is that there was some other kind of being, humanoid living on Earth at the same time as Adam and his family. I think it was the Neanderthals.