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"Theological apologists and perhaps nineteenth-century cultural evolutionists have all uncritically assumed that monotheism is somehow a "higher" form of belief than "polytheism." It seems to me that philosophers have paid little attention to polytheism until very recently. Is it so obvious that monotheism is philosophically or metaphysically "superior" to polytheism? In what way is it superior? If there is a natural evolution from polytheism to monotheism, then is there not a natural development from monotheism to atheism? Is monotheism doomed to be superseded by a higher form of belief, that is, atheism—via agnosticism, perhaps? In this section I wish to argue at:
1. Monotheism is not necessarily philosophically or metaphysically superior to polytheism, given that no proof for the existence of one and only one God is valid.
2. Historically speaking, monotheistic creeds often secretly harbor at the popular level a de facto polytheism, despite the official dogma.
3. Superstitions are not reduced in monotheism but concentrated into the one god or his apostle.
4. Historically speaking, monotheism has often shown itself to be ferociously intolerant, in contrast to polytheism on behalf of which religious wars have never been waged. This intolerance follows logically from monotheistic ideology. Monotheism has a lot to answer for...
Monotheism does seem to bring some kind of superficial intellectual order into the welter of "primitive" gods, apparently reducing superstition. But this is only apparent, not real. First, as Zwi Werblowsky observed, "When polytheism is superseded by monotheism, the host of deities is either abolished (theoretically) or bedevilled (i.e., turned into demons), or downgraded to the rank of angels and ministering spirits. This means that an officially monotheistic system can harbor a functional de facto polytheism."
Hume made the same observation:
... These demi-gods or middle beings, partaking more of human nature, and being more familiar to us, become the chief objects of devotion, and gradually recall that idolatry, which had been formerly banished by the ardent prayers and panegyrics of timorous and indigent mortals
... Schopenhauer contrasts the peaceable historical record of the Hindus and the Buddhists with the wickedness and cruelty of the monotheists, and then concludes:
Indeed, intolerance is essentia] only to monotheism; an only God is by nature a jealous God who will not allow another to live. On the other hand, polytheistic gods are naturally tolerant; they live and let live. In the first place, they gladly tolerate their colleagues, the gods of the same religion, and this tolerance is afterwards extended even to foreign gods who are accordingly, hospitably received and later admitted, in some cases, even to an equality of rights. An instance of this is seen in the Romans who willingly admitted and respected Phrygian, Egyptian and other foreign gods. Thus it is only the monotheistic religions that furnish us with the spectacle of religious wars, religious persecutions, courts for trying heretics, and also with that of iconoclasm, the destruction of the images of foreign gods, the demolition of Indian temples and Egyptian colossi that had looked at the sun for three thousand years; all this because their jealous God had said: "Thou shah make no graven image" and so on.
--- A book that Cannot Be Named / An author that Cannot Be Named