Just a theory

[Godscreated]

Where would the idea of a god or gods come from, what would cause people to actually try and conceive of such, there is no evidence to support your thought. We do see these things in religion after they were established, on this I agree. But the concept of a higher being, they had no references to go to that end.
GC

You're really stumped by where ideas come from? Do you think the idea of aliens came from aliens and if they weren't real we'd never have thought of them? Ideas come from our dreams and our imaginations.

When we sleep, we seem to go places and encounter people and things, while everyone can confirm that you never left your spot by the campfire. It sure seems like there's an invisible part of you that can walk around and have adventures while you're asleep. While you're dreaming you can encounter people who are dead, talking animals (talking anything, really), and gods (and these days, aliens).

Not to mention our ancestors were as capable of making up stories as we are. Storytelling is what humans do when its dark and there's a fire going. Memorable stories are more likely to remembered and passed on, and throwing in some superhuman feats by the heroes and villains makes the story more memorable.

 None of what you said explains anything and here's why. When we dream our minds use what we have already been exposed to, sure the mind might extrapolate something weird from the information but nothing new. A god would be something new for man because he would have not been exposed to the idea or information that would lead to such a dream, the concept would have been completely foreign to him.

 GC

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Where would the idea of a god or gods come from, what would cause people to actually try and conceive of such, there is no evidence to support your thought. We do see these things in religion after they were established, on this I agree. But the concept of a higher being, they had no references to go to that end.

It's a simple extrapolation of an idea that we are all born with.  We only see the physical form of another person, yet we project the idea of an invisible, immaterial mind behind the face of the other person as a way of explaining their behavior.  We don't view people just as bodies, but bodies which possess minds that move and coordinate their actions.  Minds which we "believe" are the same as our own, possessed of thoughts, beliefs, and so on.  From there, it's a simple step to imagine minds without bodies, such as ghosts, or people continuing on after death.  From there, it's but a hop skip and a jump to imagine minds which are able to make things happen simply by willing them.  And thus gods were born.  They had plenty of reference to immaterial minds with the power to will things to happen prior to the invention of gods.

There's an interesting experiment by Jesse Bering, in which he put on a brief puppet show for children of various ages.  In the puppet show, an alligator eats a mouse.  The researchers then asked the children various questions, such as does the mouse still need food?  Does the mouse still want to go home?  And so on.  From a young age, the children could understand that the mouse no longer had physical needs and actions, but they continued to posit mental qualities to the mouse after its death.  It was only later children who acknowledged that those, too, ended with the death of the mouse.  Interestingly enough, they repeated the experiment with groups that might have a bias towards belief in the afterlife, such as children at a Catholic school, and they found that those children did not give up the belief in the persistence of the mouse's mental attributes after death as readily as more secular children.

As for the first part of your post I disagree, it would be far more complicated than you seem to believe. As for death people understood what death was and at some point someone would have wanted to live forever because of their fear of death, but this in no way could lead to an idea of gods. In the first part of your post you are basing and assuming from a modern man's perspective, from ideas we have today not what they were missing in the ages past. The only reasonable answer is that from the beginning God made himself know to man through Adam and Eve.

GC