Nice try birdie… you quote the venerable but changeable Wiki and then in an attempt to move the goal posts you state, once again "...As I'm sure you're aware, earlier civilisations such as the Romans, the Greeks, the Egyptians, the Sumerians , etc. were all polytheistic religions. Not one religion prior to the Abrahamic religions were monotheistic…" completely disregarding the myriads of scholars (contemporaneous as well as archaic) that straight forwardly state polytheism was the degenerate results of an original monotheism: Such as:
"...When the cuneiform literature first began to reveal its message, scholars of cuneiform and Egyptian hieroglyphics soon found themselves dealing with a tremendous number of gods and goddesses, and demons and other spiritual powers of a lesser sort, which seemed to be always at war with one another and much of the time highly destructive. As earlier and earlier tablets, however, began to be excavated and brought to light, and skill in deciphering them increased, the first picture of gross polytheism began to be replaced by something more nearly approaching a hierarchy of spiritual beings organized into a kind of court with one Supreme Being over all. One of the first cuneiform scholars to acknowledge the significance of this trend was Stephen Langdon of Oxford, and when he reported his conclusions he did so with a consciousness of the fact that he would scarcely be believed. Thus he wrote in 1931:
I may fail to carry conviction in concluding that both in Sumerian and Semitic religions, monotheism preceded polytheism. . . . The evidence and reasons for this conclusion, so contrary to accepted and current views, have been set down with care and with the perception of adverse criticism. It is, I trust, the conclusion of knowledge and not of audacious preconception.
Since Langdon took the view that the Sumerians represent the oldest historic civilization, he added: "In my opinion the history of the oldest civilization of man is a rapid decline from monotheism to extreme polytheism and widespread belief in evil spirits. It is in a very true sense the history of the fall of man." (Langdon, Stephen H., Semitic Mythology, Mythology of All Races, vol. 5, Archaeologicl Institute of America, 1931, p.xviii)
"Five years later in an article which appeared in The Scotsman, he wrote: (3)
The history of Sumerian religion, which was the most powerful cultural influence in the ancient world, could be traced by means of pictographic inscriptions almost to the earliest religious concepts of man. The evidence points unmistakeably to an original monotheism, the inscriptions and literary remains of the oldest Semitic peoples also indicate a primitive monotheism, and the totemistic origin of Hebrew and other Semitic religions is now entirely discredited."
Then there's this:
Hence once more we see how polytheism develops subsequently. Reverting once more to Rowe's observation about arguing from the known to the unknown, it may safely be said without the slightest hesitation that monotheism never evolved out of polytheism in any part of the world's earliest history for which we have documentary evidence. As we shall see, this was true also in China.
Muller, Max, Lectures on the Science of Language, 1st series, Scribner's, Armstrong, New York, 1875, pp 21, 22.
Ad infinitum…
Monotheism seems to be the origin of polytheistic religions which altered that one concept of God into many gods personified by nature...
But feeling particularly equanimous this evening, I would offer that there may be historical example where the progression from monotheism to polytheism may be difficult to track or date with certainty since such records rarely exist...