Polytheism > henotheism or monolatry > monotheism.
It's pretty simple, really, especially as there is still some evidence of the process that wasn't completely redacted out of the bible.
ht
I would say Polytheism was added to the Bible. History will show a major Polytheism concept that was added.
Exodus 3:13-14 - Moses said to God, “When I come to the Israelites and say to them, ‘The God of your fathers has sent me to you,’ and they ask me, ‘What is his name?’ what shall I say to them?” And God said to Moses, “Ehyeh-Asher-Ehyeh.” He continued, “Thus shall you say to the Israelites, ‘Ehyeh sent me to you.’ ”
Not having been raised among his own people, Moses is ignorant of their God’s name and fears he will lack credibility with the Israelites. God’s proper name, disclosed in the verse 15, is YHVH (spelled “yod-heh-vav-heh” in Hebrew; in ancient times the “vav” was pronounced “w”). But here God first tells Moses its meaning: “I Will Be What I Will Be,” meaning “My nature will become evident from my actions.”
Then God answers Moses’ question about what to say to the people: “Tell them: ‘Ehyeh’ (“I Will Be,” a shorter form of the explanation) sent me.” This explanation derives God’s name from the verb “h-v-h,” a variant form of “h-y-h,” “to be.” Because God is the speaker, he uses the first person form of the verb.