Just want to share some thoughts.....
As I read in another thread, there are only a few factors needed to have an evolutionary process.
copying, survival mechanism and some kind of random or prseudom random changes (mutations).
If we think of the image that people had of God or gods, this is applicable. Copying by stories, writing and traditions. Changes are obvious and the survival mechanism is also present as the way in which the view of god was most powerfull, believable etc.
Anyway how did it evolve?
the 'lowest or earliest' form will probably be, the god-spirits. The dead people that are not believed to be dead, but keep on living as spitits.
A short step to this is the gods that are the cause of certain things. Like nature gods. A god for rain, for war, for the sun etc.
A next, bigger step is the almight god, a single god (montheism)
Is from this the next step, the good god, with a bad counterpart, the devil?
Then how come the trinity, imortal soul, angels etc in this picture. Are they remnants of a older step in this evolution?
Just some thoughs, feel free to comment or throw stones at this theory...