It isn't even hypothetically plausible that religion could not have existed. Philosophical thought was always moving in creating a belief system with one pinnacle point as the locus of it. We can look at three major [ontological] conceptual blocks of philosophy that led to the creation of a concentration of the cause&effect phenomenon in idealism, materialism, and [ontological] nihilism. These three [conceptual blocks] were born with the foundation of anthropological philosophy, but the question of the "summa summarumm" of existence bothered philosophers in the cosmological era, where the biggest question was the question of the "arche", or the founding element that is the root of all that is. Various philosophers proposed elements such as fire, water, earth, atoms, or the apeiron. With the birth of dialectics as a scientific method of inquiry, this question diverged philosophy from empty guessing and blind beliefs to a more rational and practical creation of schemes. In truth, Plato's idealistic philosophy is most probably the basis of all Abrahamic religions, given that the philosophical system covers all faucets of human abstract and real actions. Plato covers the question of creation and meaning to existence, but more importantly gives strict social norms for social hegemony, and ethics of belief for social interaction and legal order. This dimension of real-politics inevitably rose from the simpler questions of philosophy, but later drove the whole issue forward because of the need for pragmatic answers for social co-existence. All in all, religious idealistic fundamentals are actually products of materialistic questions.