For more than 75 years, scientists and historians have been working on a theory (of some researchers called a conspiracy theory) that an Egyptian pharaoh invented God more than 3,300 years ago. If the theory would hold water, it could question the foundations of several world religions. Even today in 2018. This article will focus on Akhenaten (Amenhotep IV), his religion Atenism and his motive for the first documented implementation of a monotheistic religion in the world. 1) Was it a political strategy to adopt Aton as the supreme God? 2) Did it influence or even invent the Hebrew Religion? 3) Was it a spiritual vision? 4) Was it to outstrip the powers of the priests of Amon? or 5) Was it close encounters of the fourth degree with aliens from the universe? In addition, the relations between the Hebrew religions, here especially Moses, and the Atenism is of great importance to the analysis and all considerations lead to a possible answer of the question: was it the birth of monotheistic religions in this period of Ancient Egypt’s history?