An entity rosen from the need, dream and question raised by humankind, as answer or as source.
Although the argument of existence, regarding one or more of these entities seems to be an everlasting issue, much evil and good have been performed by humans in the name of gods. Can it argued from this statement that the actions of a god (existing or not) are the actions of its believers?
Then a god would be existing as soon as any number of persons acted in its name.
Then humans would be creating the gods which presumably would have created them.
How can gods both be creators of the world and part of it?
If a god created and defined the world we live in, it is impossible to define a god without self being a god.
And even then it is given that a god must have some rules defining it, thus having its own gods... (Gödel's incompleteness theorem, sort of.)