Many gods or polytheism came first and this evolved over time, into one God; two upgrades for consciousness.
Many gods were connected to specialization, like we do in science; science is like rational polytheism. In polytheism, we had a goddess for love and a god for war. These are two specialty skills, that do not exactly connect to each other. Specialization was also reflected early culture, in the sense of jobs; carpenter or farmer. Each got good at what they did; passed from father to son, and traded.
The main problem with this, was making the big decisions, that needed lot of experts, in many different areas, that do not exactly overlap. How do you get the goddess of love and the god of war to agree on a new bridge? Nothing big ever gets done. Experts in each field have earned their prestige; they are important, so they need to defend that prestige; importance, in the gray areas, they do not know; political gridlock.
Monotheism solved this egocentric politics problem; pride, by having an all knowing executive, at the top, to make the big decisions. God is assumed to be omniscience, or he knows all the sciences, and therefore can blend and integrate; plan, create and even engineer. The biggest jobs now can get done. This needed integral thinking in 3-D; out of the many, one. (e pluribus unum).
In science, the Physicists may not know what the biologist is doing; their new frontiers, and vice versa. These two experts may have the data needed to connect life at the quantum level. But in the land of specialty gods, this will never get done. This would need the generalist who dabbles in both of these fields and can figure out how to merge the two; e pluribus unum
If you look at Evolution versus Creation, Evolution is only about the life aspect of the universal changes. It does not address and connect the cosmological aspects. We have two science gods, that each have their own niche, separated by a gap. Creation is more in the style of cradle to grave; BB to earth and sun, to life, to human consciousness and beyond; connected omniscience by one God.
I prefer the omniscience approach; Generalist. It is way harder to do, even for less prestige, which is why people specialize. There is less prestige being half baked in everything; rational monotheism, compared to fully baked in one thing; rational polytheism and politics.