Could it be at one time in the history of the world that everyone was a Pagan?
Althought one might argue that the Hewbrew myth decipt the Jews as monotheistic from the very begining but how unlikey is that?
In Pagan Theology, Michael York makes the argument that Paganism is the mother of all religions. Not only does he argue that all religions come from Paganism, he also argues that all religions have some pagan behavior still in them (e.g. ecstatic worship, idol worship, polytheistic worship, a focus on the here-and-now vice salvation or escape from illusion of the world). I'm not sure that I buy all of the things he is saying, but he does make some good arguments. From dictionary.com pagan means either a polytheist, or one who is not Christian, Jewsish, or Muslim...I can think of some things I've read that suggest this. In the Norse traditions, there is talk of a God named Ing (or Ingwaz) that predates the Odin mythos. There is also a Goddess named Berkhano that I believe predates Odin mythos as well. However, I am no Germanic scholar.
I think there is also something along the same lines in Egyptian mythos but I am not sure.
And, in the GrecoRoman, Uranus came before Zeus and his pantheon and in some tellings Eros came before Uranus.
So, I think there is some evidence that suggests that there was monotheistic worship before polytheistic worship (although it may have been female-based rather than male-based this doesn't mean it wasn't pagan
