Ten-thousand year study, you mean. At least. I'm not an antiquity specialist, but from what i've heard the first monotheism was probably zoroastrism (might hav

Ten-thousand year study, you mean. At least. I'm not an antiquity specialist, but from what i've heard the first monotheism was probably zoroastrism (might have been a duotheist religion as first, with their Satan equivalent being as powerfull as their version of god), and might have appeared more than ten thousand years ago. Followed by some version of Hinduism, then either the Aton cult or judaism (i've heard theories about Judaism started becoming a monotheism after an exile from egypt of Aton priests).