This is a response to the part of azor's request for thoughts on the statement that:
"The Bible for the first time introduces a singular monotheistic god."
I think it is more honest to say that, the proto-jews, believed in one god (yahweh) who was their god, and who they considered to the "true god," that is, a 'real' god as opposed to 'unreal,' or 'false' gods who did not really exist. A re-reading of first Kings ch.18 regarding the contest between Elijah and the priests of Baal surely demonstrates that.
The texts claim that this 'real' god revealed himself to Israel's forbears, and continually demonstrated his 'realness' through his dealings with the one family who worshipped him as their own god.
However, that idea is not supported by facts. Professor Mark Damen (Utah State University) calls attention to a wider possibility.
The concept of monotheism has deep roots in Western Civilization, reaching as far back in time as the New Kingdom of ancient Egypt, well before the formation of the ancient state of Israel or the advent of Christianity. - Reference: http://www.usu.edu/markdamen/1320hist&civ/chapters/10AKHEN.htm
He is (as that page makes clear) talking about the "new" religious teachings of Akhenaten, an Egyptian Pharaoh of the fourteenth century BCE, likely before the formation of any Israelite nation.
To what extent there was a prior discussion is unknown, as is the spread of the idea after the reinstatement of orthodoxy in Egypt.
We also know the concept of a supreme god was spreading among Greek thinkers at the time of Plato, that quite possibly primed the way for the success of early Christianity.