What led to the emergence of monotheism?

An informative, historical article. Monotheism, polytheism, spiritual beings, demonology, witchcraft, evil spirits could logically fall into the category of superstitions which convey psychological benefits and social status to the sundry adherents. Currently, the pseudo religion of militant atheism is in the same vain. Since the existence or non-existence of the supernatural can be be neither proved nor disproved, it' s not unexpected that a philosophical evolution in religious beliefs would be in-progress based upon the changing needs of those seeking solace, hope and belonging despite illogic and the experienced based physically impossible. However, for the cynic such still begs the question. "Where's the proof"?