More often, other alleged gods are simply denied any reality at all, or perhaps claimed to be demons tempting people away from the True Faith. This exclusivity has resulted in less religious tolerance and freedom in traditionally monotheistic cultures. The origin of monotheism is unclear. .
The first recorded monotheistic system arose in Egypt during the rule of Akhenaton, but it did not long survive his death. Some suggest that Moses, if he existed, brought monotheism to the ancient Hebrews, but it is possible that he was still henotheistic or monolatrous. The earliest Egyptian civilization believed in a single supreme god, who had no name but was described as the source of light the creator of all. He brought fourth rules or natural laws and in their diagrammatic literature these were personified in what we see as the gods and goddesses. Briefly around 1350 BC flourished the worship at Armana in Egypt of Aten/Aton as the one and only manifestation of god, in the near east Zoroaster saw the revelation of one supreme being in the eternal flame around 600 BC and some hundred year later in the Middle East appeared the historical writings from the descendants of Abraham, and out of whose customs grew Judaism, Christianity and Islam. .
The form of monotheism which is traditionally most common in the West and which is too often confused with theism in general is the belief in a personal god which emphasizes that this god is a conscious mind that is immanent in nature, humanity and the values which it has created. This god is both independent of and distinct from the created universe and also presently active in the created universe. Because this form of monotheism dominates so strongly in the West, it is not uncommon to find people who simply give it the label "theism," ignoring all the other forms as being types of theism. .
When Abraham was held back from sacrificing Isaac by God around 2000 BC, his God which became the God of the Israelites was seen as but one of many.